How come no one has suggested VV batteries? I love my eGo style batteries, but I think that suggesting VV is somewhat important. This kit is more expensive, but you're getting genuine Joyetech, or Vision batteries, and you don't have to wait for it to ship from China:
http://www.myvaporstore.com/Vision_Spinner_Joye_Ego_C_Twist_Combo_p/vvs-c.htm
I'd probably go for the 650 or 900mAh batteries, and the EVODs.
EDIT: If you don't know what VV is, it's variable voltage. You can dial in on the taste/vapor production that you want. Also, you'll probably want to buy some extra EVOD head/coil assemblies - until you get the itch to start rebuilding your own.