This is the one I am using with the Trakpower lipo
http://www.flightpower.co.uk/acatalog/Chargers.html
Its great, not much more to say about it really, will mention it in the trakpower lipo review though.
There were a few guys running the TrakPower lipo tonight (touring cars) running a range of different chargers.. there is no real advantage (pun!) to any of them..