I'd have to seriously recommend the Mega Power 960SR:
http://www.aero-nuts.com/product_inf...roducts_id=570
I've had one for several moths, and it's stunning. It's actually the same charger as the Robbe Power Peak Infinity 3, but rebadged and at a lower price (it's made in the same factory).
It is fantastic, though. Compatible with NiMH, NiCd, LiPo and A123,
it'll charge and balance up to 12S in one go, 180W of charge power (you'd have your work cut out to use all that), has a 50W discharge ability, displays temp and voltage graphs in realtime (you can even scroll about and zoom in on them), it balances very accurately, and also has a second output so you can charge your transmitter pack at the same time as you charge your main pack.
The balancer is external, but fully hooks up to the charger. This thing is ridiculously programmable, and also has a whole host of safety features. You can even program your name and choose from a choice of "charge finished" melodies. No joke.
I know you'll probably ignore this and go for a more well-known brand like Hyperion, but honestly, this is an amazing charger at an awesome price and will do stuff that the Hyperions can't. It's also very well built with an aluminium casing...you just need a DC input for it. I'm incredibly happy with mine.
The Hyperion 0610i is still a good choice, but my recommendation goes for the 960SR.
Incidentally, I'd suggest steering clear of the chinese knock-off chargers; I had one and so have some of my friends (various models) and they've all failed...some dangerously so. My friend's Imax B6 actually had its internal output solder joints melt off, and almost caused a short while my eStation 501DX knock-off (X-Power, it was called) died a silent death whilst being used perfectly within spec.