Top of the line : -
1. Turbo 35GFX (w/motor run in)
2. Pro-trak (w/motor run in)
3. CDR500 (wo/motor run in)
Pocket friendly charger : -
1. Integy 16x5 / Eagle CDC v6.0B
2. LRP Pulsar 1 , 2
3. Orion D48
4. Novak Millenium
5. Pit Bull X3
This are just some of the chargers that people used.
It all boils down to how much are you willing to fork out for it.
You can never go wrong with either one of those chargers that i have mention.