What would y'all recommend as white against the Chebanenko Slav? This opening has been giving me lots of trouble lately. In the following diagram, 5.c5, 5.e3, 5.a4, and 5.cxd5 are all popular options played by 2600+ players.
So far I've been playing 5.e3 but am not really enjoying the resulting positions. 5.a4 seems pretty sharp from the games I've looked at. What about 5.c5? Seems pretty natural given the weakening of the b6 square.