Considering the charger that you have been using, I would recommend the Gyrfalcon AII-44 (4 bay) or AII-88 (8 bay) charger. They are both very simple to use. They have charge currents of .1, .25, .5 and 1.0 Amps, continuously display cell voltage for each bay, and charge all chemistries. The default setting is 1.0 Amp for Lithium cells and .5 Amp for NiMH, but you change the current for any bay at any time.
I have other chargers and I like them, but I think you would be very happy with the Gyrfalcon.