the cell master is a very good nimh charger but ass soon as u ad lipo to ur race packs ur stuck with a 1 amp charge rate.
ice is good imo the mv is a bit high for 4200nimh packs (bit hot here in aus) but apart from that pretty good.
checkpoint has proved to have discharge issues but has the major refinements the ice is lacking backlit screen lower mv, 2c lipo charge.
if i were u and u can stretch your budget the eagle or integy depends if u order from japan or usa, cdc7 or climate controlled charger. pretty much a checkpoint with a 20 amp linear discharge and a few other nice fetures. worth it imo