Hi Dale . .
Weight is not paramount in this plane, actually. Lighter (to a point) is always better, but this plane handles more weight very easily, probably due to it's initial VERY light construction.
I have always used 'cheap' batteries in this plane and the performance is outstanding. I only use the plane for F3A practice (between practices ;-) as I use a full 2M for competition, but it definitely does some things better than my 2M planes (e.g. snaps and spins. also, the 1 1/2 KE snap is much nicer with this plane) . . HOWEVER a friend of mine actually used this plane IN competition recently (F3A - P09) and scored high 400's in front of two World class judges (they ahve judged numerous World Champs and CAOCC events) . . SO the plane (and the pilot) is VERY capable.
I use ZIPPY "H" packs. My set-up is for 5S packs not 6S (different motor - Hyperion HP-Z4025 486kV) and runs at 1100W static at just over 60A draw, so I would expect the 6S set-up to be around 50A at 1100W. I fly a full P09 F3A schedule and replace around 2100mA into the pack (about 7 1/2 to 8 minutes flying with a lot of vertical stuff), so the 6S should use less than this . . maybe 1900mA? PS. You want to aim for 1000W to 1100W . . it flies OK at 750W BUT struggles with verticals. That's all I got out of OTHER packs using the same set-up ! ! The ZIPPY "H" have been the best to date.
The 3300mAh pack would be fine . .
http://www.hobbycity.com/hobbycity/s...0C_Lipoly_Pack
Although, if you want longer flight times, use the 4000mAh
http://www.hobbycity.com/hobbycity/s...5C_Lipoly_Pack
PS. these packs are 20C - 30C burst . . and that seems accurate ! . . and NO . . I am NOT sponsored by HobbyCity :-(
'Side comment' . . for long battery life . . I have found it best to only fly out 1/2 to 2/3 of the rated capacity of the pack, and more recently, I DON'T store them fully charged, leaving them as last flown . . i.e. about 1/2 capacity. That seems to be help too (many of us here have been flying LiPos for about 4 years and have tried MANY packs under all sorts of conditions . . Others might have different options and results, but I am happy with our testing to date :-)
Cheers, JB