Yeah I was going to recommend that Sony Match referred to (I don't own it though). Two things you want to look for are: 1) "Smart Charger" - means it monitors the battery and stops charging when it's completely charged (as opposed to the usual "dumb" chargers that are timer based and can "cook" cells after they are fully charged). And 2) Able to charge single batteries (i.e. single-channel) so you're not stuck charging in pairs. If you have a 3 cell device (3AA light, 3AAA light, etc . . .) it's tough to charge the batteries in a 2 or 4 cell dual-channel charger.
I bought the AccuPower IQ328 from Ebay (see thread here). I believe it's a BC-700 clone, however it does discharge tests at 500mA whereas the BC-700 only does 350mA (and only charges at 700mA max compared to 1000mA for the AccuPower). I really like mine. I also heard the BC-700 capacity tests come out higher than "true" (see the charts at the Ebay link - but I also read/saw this elsewhere).
If you don't want to discharge test your batteries, or don't need a high charge rate, go with the simple Sony. Only issue on the Sony is that there is only one LED, so you can't tell when individual cells are done charging.
-Garry