I now have 4 different kinds of chargers and can't say which is best because I use them all.

The ones suited for your application would be:

Triton - good all round charger/discharger/cycler, but only does one battery at a time. I don't use the cycling function much, but other features are handy for my lipo packs (such as partially discharging them for storage).

Hobbico MK II - less than half the price of the Triton and will do 2 packs at once, but has a max charge rate of 2000mA (Nicad/Nimh) or 1000mA for Lipos and only charges Lipos to 80% full. It would take about 1.5 hours to recharge one of your fully discharged nimh batteries.

The only reason I would have trouble recommending the Triton is because it looks as if you fly big electrics. There is a new cell out now, the A123 cell, which seems better suited to large electrics than any other cell and the Triton does not charge these.

If you've got the money, consider a Triton or a Trition Jr. If you stay with electrics, you're likely going to pick up a few extra chargers along the way anyway and it's good to have at least one charger with extra features.