if u are just a casual user, its eneloop, imedion(powerex) or recylco(GP) all the way. iirc my set of eneloop lasted me 500+ small burst of flashes from sb600 and its still going on.;p don even need to bother about having another normal rechargable as main.
If you need more capacity, I'd recommend PowerEx 2700. Very long-lasting batteries. If you need the 80% remaining charge after a year without charging then the Imedion ones are better but they are rated at only 2100mAH.
u might hav got those batch that has problem. i encountered similar things b4 with the sanyo 2500. went to sanyo office @ orchard to exchange. very happy after that. but urs 3 yrs liao, not sure if they will exchange or not...
Do GPs have higher capacity as compared to the Eneloops? I'm thinking of switching to rechargeables. I shoot quite a bit of work so I have access to a lot of alkalines, but after a while the charging time becomes a nightmare... sadly they are not Energizer e2s, just plain old Panasonic alkalines.
How much can I expect to pay for one set of 4 eneloops with the quick charger?