"I just look for the ones with the highest mAh. My duracell 2650s are awesome."
Your Duracell 2650s are not of the low self-discharge type. As such, they will drop their charge after a month regardless of use. This means that in order to get remotely close to that 2650mah of use out of them, you must fully charge them immediately before putting them in the controller, and then use the controller so heavily that you drain the batteries within a week. Otherwise, a 2000mah low self-discharge AA cell will out-perform a 2650mah standard NIMH every time.
In short, looking for just the highest mah rating is bad advice, especially for the topic at hand.
My advice, fxspec? Go pick up a $10 pack of "ready to use" or "pre-charged" AA cells. You'll rapidly decide that your Duracell 2650s are far from awesome, but are much closer to "acceptable, if it was 2005". They are also great for use in a digital camera, as long as you make sure to charge them right before you go on a heavy picture taking day.