There are quite a few that will serve well. I've been using a Hitec X2-400 and 30A Powerbox for the last 2-1/2 years and they've done well all the way up to 22k ma 6 s batteries. Set the cell count and storage discharge level is auto set. I use it for my Chroma batteries as well.
i just got a duratrax onyx 255 it charges two bats at a time has a five year warrant and my hobby shop says
their customer service is real good and it does all chemistry batteries so with the charge adaptors i got
for the H bats i'm good to go