7...cxd4 8.Nxd4 Qb6 is I think currently the best reputed option, the directness makes the engines really happy, I think Matthew Sadler talks the line somewhere... can't remember where
The idea is simply Bc5 overtaking d4. And of course using this move-order hits b2 at an opportune moment.
9.Ncb5 a6 10.Nf5 Bc5 11.Nbd6+ Kf8 12.Qh5 Nd8 13.Nxg7 Bxe3 14.Nxe6 fxe6 15.Qe8+ is a propetual
9.Na4 Qa5+ 10.Nc3 Qb6 just repeats
The 9.Be2 and 9.a3 are a bit less directly drawish, but with a few moves of book promise clean equality.
The mainline 9.Qd2 is pretty forcing up to:
9...Qxb2 10.Rb1 Qa3 11.Bb5 Nxd4 12.Bxd4 a6 13.Bxd7 Bxd7 14.Rb3 Qe7 15.Rxb7
Where black has 15...Qh4+ and 15...Qd8 16.O-O Qc8 or 16...Rc8 I believe they all should be fine for black, I think I recall Sadler recommending Qc8... the positions do remain tricky, but nowhere near Winaver levels of mystical.