Chad, Try to keep your weight to 38 oz (which would include your radio gear). What you'd be looking at with the following set up would come to a total of 4.5 lbs. This combo used with your geared AF 25G will give you about 335 watts @ 22 amps. This comes to about 75 watts/lb to give you mild aerobatics.
(you have a matching ESC for the motor, right??)

(14) sanyo# CP1700SCR cells
11X8 APC electric prop

Good luck and let me know how it works! Jim