Most dischargers are about the same. Just make sure you get one with at least a 20 amp discharge and preferably 30 amp. The old trusty lightbulb discharger will work fine if it has an automatic cutoff.
The nimh cells still need to be discharged even tho they have no memory to them. The also need to be equalized at .09v before charging back up again. The current cellof choice is the GP 3300 nimh. Several matchers sell this cell, 90% of them are close as far as quality. Try picking one close to you for service and just to support your local RC scene. They also have alot of information your looking for on thier websites.