Whenever I encounter topics like this or reviews, the Eneloop would came out as the answer, really.
And an hour ago I just bought a pack of 4 AA's + quick charger. Mainly for my flash, but sidelines on my wireless xbox 360 controller.
this is the right answer. consider that there are tradeoffs in an AA package.
* you can make materials thinner to get more capacity, but the cost will be internal resistance (cycle time)
* in addition to the above you can optimize for capacity but the cost will be self discharge
* in addition to the above you can optimize capacity and internal resistance, but the cost will be # of cycles.
in short, the very best sweet spot for AA strobe use is the Eneloops. combine that with the known reliability reputation and you have a no brainer. be sure to look at all three variables (read the data sheets):
1. internal resistance
2. self discharge
3. number of cycles
get a good smart charger like the Maha 801D (8 cells at a time). here you want individual circuits for each battery . a soft charge and and re-condition cycle are must-haves.