To my opinion very strong is 
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Na6 8. Re1 c6 9.Be3!? with the idea of c5. I mean 9...Ng4 10.Bg5 Qe8 11.c5!? I analysed this position for a while and found it almost lost for black. So I have played in one game 9...Ng4 10.Bg5 f6!? 11.Bh4 exd4 and somehow I survived this position although it is quite tough for black (black has to play Nh6-f7 and stand a bit, look what white will do) 

Yeah, I analyzed this move a while back, and came to the conclusion that it was without question the best way to play for Black. The main lines with 10...exd4 look almost losing to me! What about the other main line with 8. Re1 and 9. Bf1, does anyone have a recommendation here?

I've looked at your line for a couple of days and come up with absolutely no satisfactory line. Boo hoo for me. Back to the figurative drawing board.

Ah Interesting! Thanks for tipping me off, and congrats on your first post!

Thanks for the kind words Bibs. Interestingly, I just had a 15-minute game against an FM in the 8. Re1!? line just now. Here it is, any improvements would be great, since I was definitely worse at various points:

[Event "ICC 15 0"]
[Site "Internet Chess Club"]
[Date "2008.09.22"]
[White "AlonzoMosely"]
[Black "TonyRo"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2176"]
[BlackElo "2066"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6 7. O-O e5 8. Re1 Qe8 9. Bf1 Bg4 10. d5 Nb4 11. a3 Bxf3 12. gxf3 Na6 13. b4 Nh5 14. Be3 f5  15. Na4 fxe4 16. fxe4 Nf4 17. c5 Qe7 18. Qg4 Nb8 19. Rac1 g5 20. cxd6 cxd6 21. Rc8 Nd7 22. Rc7 Nf6 23. Qe6+ Qxe6 24. dxe6 Nxe6 25. Bc4 d5 26. Rxg7+ Kxg7 27. exd5 Nf4 28. Nc5 N6xd5 29. Bxd5 Nxd5 30. Ne6+ Kf6 31. Nxf8 Rxf8 32. Bc1 Nf4 33. Rd1 Rc8 34. Be3 Rc3 35. h4 g4 36. Rd7 Rxa3 37. Rxb7 h5 38. Rxa7 Rb3 39. Rb7 Nd5 40. Bc5 Kf5 41. Rh7 Nf4 42. Rb7 Ne6 43. Be3 Nd4 44. Kf1 Rb1+ 45. Kg2 Nf3 46. Rc7 Rg1# {White checkmated} 0-1

One thing I took away from this game is that in these positions, ...f5 does almost nothing. Black's going to have to base his play off pieces, and probably forget about ...f5 for the time being. Also, c5-c6 is a huge threat in these lines because of the Bf1 eyeing the Na6, which I caught just in time. The best line for Black here is probably the very precise 14...Qe7! 15. c5!? bxc5! 16. Bxa6 cxb4! 17. axb4 bxa6 18. Bc5 Qh4! (18...Qg5+!?) 19. Bxf8 Bxf8 20. Ne2 Bxb4 21. Rf1 Qh3 22. Qd3 (22. Rxa6? Be7! -+) Be7 with compensation. If it's enough, I don't know, but it's certainly a mess! If White tries to stop 23...Bg5 with 23. Qe3, then 23...Qh4 persists with the idea. Good times!   

The work is already paying off....even though I was worse.  

I realize this has probably been talked about quite a bit on this forum, but I'm going to start another thread about this line anyway. 

I was bored today and decided that a switch to the ...Na6 lines was in order, given my frustration with various ...Nc6 lines. I started by just looking through some recent games to see if I even like the positions, which I do. Then I decided to just dig in and do some work and to map out a repertoire. Typing all of it would be ridiculous, but basically I just went through a database and for each line that was played a lot, I selected what I thought was a good enough / best line and then selected some thematic high level games and put them into Wordpad, and went through them, analyzing them for improvements and trying to learn from them. Here is a brief synopsis. The 8. Re1 lines look to be the most worrisome to me, and I would welcome any thoughts on my chosen lines, what you play, and any moves that I missed (I may just not have posted them here for length reasons)

After 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Na6!?

MINOR LINES:

8. Bg5 h6 Chosen game --> Kreiman-Nakamura, Foxwoods '03

8. d5 Nc5 Chosen games -> Keene - Torre, Manila '79

8. dxe5    Chosen game --> Osthoff - Naumann, Bad Wiesse '03

8. Rb1      Chosen game --> Goriachnik - Poldauf Parnormo '01

MAIN LINE 8. Be3 Ng4 9. Bg5 Qe8 

10. dxe5 dxe5 11. h3 f6 

Chosen Games --> Harikrishna - Morabiabadi, Dubai, '04
                            Medvegy - Brandenburg, EU Champs, '06
                            Barus - Damljanovic, Bled Olymp., '02
                            Simutowe - Perelshteyn, New York, '03
                            Pacheco - Izoria, World Junior Champs., '03

10. dxe5 dxe5 11. Nd2 f6

Chosen games --> Schact - Perelshteyn, Foxwoods '07
                           Sasikiran - Mahadeo Thipsay, BPCL ch, '02

10. h3 f6

Chosen games --> Kadimova - Movesesian , Cappelle Open, '02

MAIN LINE 8. Re1 Qe8 

9. Bg5 c6

Chosen games --> Renet - Marc Degraeve, French Champs, '07

9. Bf1 Bg4 10. d5 Nb4

Chosen games --> Ftacnik - Fercec, It Op., '98
                           Illescas Cordoba-Gelfand, Wijk Aan Zee, '93
                           Korchnoi - Gelfand, Wijk Aan Zee, '93
                           Ivanchuk - Milov, EuT Champs., '01

I'm a little suspicious of 10...Nb4, but I wasn't sure if there was anything much better. Let me know what you guys think.