Instead of 9...Qa5 10.gxf3 , isn't there also 10.Ke2 Kh8 11.Rhg1? (which is probably still a good idea in the NCO sequence you quote).

I think that's actually the first game with this variation that I ever saw in 2003 (it was in an article on the Bundesliga season):
Savchenko,S (2560) - Schmittdiel,E (2483) [A85]
Bundesliga 0304 Germany (11), 10.2003
1.d4 f5 2.c4 Nf6 3.Nf3 e6 4.Nc3 d5 5.Bf4 c6 6.e3 Be7 7.Bd3 0-0 8.Qc2 Ne4 9.g4 Qa5 10.Ke2 Na6 11.a3 Nxc3+ 12.bxc3 dxc4 13.Bxc4 b5 14.Ba2 Nc7 15.Bxc7 Qxc7 16.gxf5 c5 17.Qe4 c4 18.fxe6 Bb7 19.d5 Rad8 20.Rad1 Qc5 21.Bb1 g6 22.Rhg1 Rf6 23.Ng5 Bxd5 24.Qh4 Bf3+ 25.Nxf3 Rxd1 26.Ng5 h6 27.Qxh6 Rd2+ 28.Ke1 1-0
Ever since I've enjoyed playing that as white, however this night I failed to win the following game against a promising youngster, which is very similar, I suppose.
1.Nf3 d5 2.c4 c6 3.d4 e6 4.Qc2 f5 5.Bf4 Nf6 6.e3 Bd6 7.Bxd6 Qxd6 8.Bd3 0-0 9.Nc3 Ne4 10.g4 Na6 11.a3 c5 12.gxf5 cxd4 13.Nxd4 Nac5 14.Bxe4 dxe4 15.Nxe4 Nxe4 16.Qxe4 exf5 17.Qd5+ Qxd5 18.cxd5 Bd7 19.Ke2 Rfe8 20.f4 Rac8 21.Rac1 Kf7 22.Rxc8 Rxc8 23.Rd1 Ke7 24.Kf3 Kd6 25.e4 fxe4+ 26.Kxe4 g6 27.Rd2 Rc5 28.h4 Rc1 29.Nf3 Bf5+ 30.Ke3 Rc5 31.Ng5 Rc7 32.Rd4 Rc2 33.Nf7+ Kd7 34.d6 Rxb2 35.Ne5+ Kd8 36.d7 Rb3+ 37.Kd2 Be6 38.a4 Rb6 39.Ke3 Rb3+ 40.Ke4 Bf5+ 41.Kd5 Rb6 42.Kc5 Be6 43.Rd2 Ra6 44.Rd4 Ra5+ ½-½
Well, not the finest display of endgame technique...