Hey Zack...I'm happy with the motor choice too... it's a good thing I decided to take advantage of Castle sale... I'm still thinking of running a pair of 5s (between 30C and 40C preferably) lipos in parallel...
Here are the candidates:
ZIPPY Flightmax 3000mAh 5S1P 40C
ZIPPY Flightmax 4000mAh 5S1P 40C
Rhino 4900mAh 5S1P 20C Lipoly Pack
Rhino 3700mAh 5S1P 20C Lipoly Pack
I wanted to add Turnigy to the list, but I haven't seen any with the C rating/cell count i'm looking for.
Alien