I've flown the Addiction-X with the iPas setup using 3S 20C batteries ranging from 1800mAh through 2200mAh in size.
A 3200mAh will work fine... though it will increase the loading.
For more info go to
http://www.precisionaerobatics.com/
I can't underscore how much I like this plane.
I was put off by the price, but I saw the plane at the Toledo show and I jumped at it with the full iPas package.
The iPas package adds the motor, servos and pretty much everything you need to finish the plane.
I could have done without the battery pack, but the rest was/is an absolutely perfect match to the plane. At the very least get the motor and props then use the servos they include with the iPas setup. You can substitute your own ESC.
The motor coupled with their prop puts the motor into the most efficient and powerful range. I have my timer set to 12 minutes for my 2200mAh battery packs.
You can yank the plane up HARD into walls manouvers, etc... the carbon fiber re-inforcement holds it together as the plane buzzes like a mad bee with the sudden changes.
I get a lot of "whoa"'s given that it all holds together.
In many ways I like it better than some of my larger 3D planes.
Check out the videos on the web site... it really is that nice.
If you have Realflight you can see how it flies by downloading this file...
[link=http://www.knifeedge.com/forums/downloads.php?do=file&id=17193]Realflight Addiction-X iPas setup[/link]