Personally, I like the 3-cell 730mah pack with the 1080 Kv E-Flite Park 370 outrunner. The current draw is a little higher on the E-Flite outrunners and because of this the 12V packs seems to have a better feel. The Kv is a little lower on the E-Flite motor (1080) than the AXI 2208/34 (Kv=1140) so one might be able to run a little larger prop and get some of the performance back.

George