Thanks for the reply.  I have an Epishin-Gofstein game annotated by John Emms a couple of years ago but hadn't seen the Harikrishna-Cheparinov game which must have appeared after my subscription lapsed (obviously, it's time to renew the subscription!).

In the 8...Bg7 line, I didn't like the look of the endgame (or queenless middlegame?) after 9.e5 dxe5 10. Qxe5+ Qe7 11. Qxe7+ Kxe7 but hadn't given it (or the alternative 10...Kf8) much thought.

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 a6 has become a popular line in the Benoni (7...a6 is the main repertoire recommendation in Watson's book).

Today in the Olympiad, Onischuk-Pantsulaia continued with
8. Qe2

and after 8...Qe7 9. e5 dxe5 10. Nxe5 Nbd7 11. Bf4 Nh5 12. Nxd7 Bxd7 13. Bc7 Rc8 14. d6 Qxe2+ 15. Bxe2 it looks like Black is really struggling.  I know 8.Qe2 is not a novelty, although I think it's a fairly recent development in the line.

Has anyone seen a good line/model game for Black here?  Is it time to toss 7...a6 in the trash bin and go back to 7...Bg7?  (Maybe it's time to take up the Queen's Indian?!)