I've standardized on sanyo eneloop, have two sets for every piece of important gear, one to use while the other is charging.
Although I had a good collection of NiMH (AA and AAA) batteries, I too have decided to standardize on Eneloops.
I bought Eneloops before Christmas and so far after heavy use in the cameras and mp3 players, I am impressed with them. They were on sale last week so I bought a few more.
With the regular NiMH batteries, they do self-drain fairly quick. I checked the Eneloops right out of the package with a voltmeter and they were only down 200 mh which is quite good as there is no way to determine how long they sat on the shelf before they were purchased.
I have one package of the Eneloops that I topped up the charge on. They are my test set as I want to determine how much voltage drop there is after 30, 60, 90 days.
As for charging the Eneloops, any NiMH battery charger will work...there is no need to waste your $$$ on a "Eneloops specific" charger.