I love those Sanyo 2500s! They are incredibly consistent. Thomas Distributing has them cheaper than DX - $8.57 for a 4pk, less w/ a coupon code.

I was recently suprised and extremely pleased with some DX Soshine AAAs; listed as 1100mAh which after conditioning in came in at 1050mAh each. Might have been a fluke, may not hold true for their 2500 AAs, they may not last as long as a Sanyo but seems worth mentioning. I'd be tempted to try them if I needed something else from DX except they cost the same as Sanyos.

I'd be surprised if MOST of the batteries on DX weren't fake, though. For premium cells for key uses (like the S/2500 or Eneloops) I stay away from DX. Even the Soshines are probably fake since they are not in their product listing. Which is why I was surprised.