Are you planning on using an overgrip? I've found that wider leather grips such as Babolat work best with Tournagrip's offerings (especially the XL) where if you're using an overgrip that isn't as wide such as Yonex you're better off with Gamma or Head. As to weight, I've tried Gamma, Babolat and Head and I feel the Babolat (which I use) grip is the heavier of the three. The Head grip is thin and really gives you sharp edges but is probably the lightest of the three.
(4) Volkl PB 10 Mids
Babolat Tonic+ 16/Babolat RPM Team 17 @ 51 lbs