You asked for half decent. If you’d asked for crap, I’d have linked to a ten quid charger. I’ve got one of those; I’ve just thrown it in the bin after it failed to cut out after charging and ruined four batteries.
Most recarbs will start to discharge as soon as you unplug them. After a week in the drawer, your nice 2000mAH cells will probably be holding about half that. The Eneloops I linked to don’t do that. Also, they’re pretty colours; aesthetics aside, that means you can make sure that the same batteries stay together in the same device and are subjected to the same loads.
The charger juices each battery individually, so if you’ve got one that’s dead and one that’s half full, they’ll both charge correctly. Also, it’s got a refresh mode which can revive batteries that no longer hold their charge. Of the aforementioned four batteries I had, three of them now work correctly again (the fourth still won’t hold more than about 400mAH – but at least I now know this and can toss it out rather than chucking all four).