I use EC2 on the top and G2 as reso. I don't care for the overtones I get from the G1. However I use a drumframe, thin shells,
pearl mini mass lugs, and RIMS... I have quite a bit of resonance to overcome. The combination of the EC2 batter/G2 Reso is nice and thuddy.
G2/G1 combination sounds good... and a G2 is basically the EC2 without the edge control ring. That edge control ring is supposed to help you tune the drums easier.