Developments in the Sicilian Kan 5.Nc3 Qc7 6.Be2

Here is an interesting game from Delchev.

Horvath,Ta(2398) - Delchev,A (2598) [B43]
6th Varna Open Varna BUL (7.4), 18.07.2012
Black has typical counterplay well under way. Both bishops are fianchettoed and the e5 pawn is a permanent target. The queenside pawns are poised to advance and black controls the d-file. But how to proceed?

Black to play