Thanks for your advice Mr. Kosten, your great book has served me well over the last few years, and I still think of it as the most useful opening book in my library.
Fortunately I'm collecting all my blitz games with this guy (my rating is only ~1900 ELO and he's a tough nut to crack with his ~2300, at least for me), and I finally found one with the line your advocating:
1.c4 f5 2.g3 Nf6 3.Bg2 g6 4.Nc3 Bg7 5.d3 e5 6.e4 d6 7.Nge2 O-O 8.exf5 gxf5 9.O-O Nc6 10.d4 Qe8 11.d5 Ne7 12.f4 e4 13.Be3 Ng4 14.Bd4 Qh5 15.h3 Nf6. Then I played 16.Qd2 to prepare the somehow artificial knight manoeuvre Nc3-d1-e3 and lost the game later on, but I suppose this had nothing to do with the opening...
In fact I like this line much more than those in my first posting, so do you think I chose the right setup here? What shall I do if he maintains the tension in the center by, let's say, 11...Ne7 12.f4 Ng6, perhaps followed by h7-h5-h4 with a kingside attack?
I'll be playing a regular tournament game against this guy in a few days, and I hope to offer him some resistance