The B6 charger is sold in a lot of places. Very affordable and does a perfect job for the average guy. Completely idiot proof too. It will charge any battery up to 5000mah pretty much. Don't waste your money on Nimh's. Lipos can be found for the same price and deliver much better performance. Turnigy has their own version of the B6 charger as well as plenty of affordable batteries.
http://cgi.ebay.com/IMAX-B6-Lipo-Bat...item27b38afd12
This is the exact setup I have, paid 50 bucks to the door. Works just as good as the 200 dollar chargers which are the same internally, just in a fancier case with a name brand. I bought mine from this seller as well. Top notch IMO.
You may not want lipo now but you will later on. Trust me. This charger will do whatever you need. All you will need is a Traxxas adapter or switch to Deans connectors on your rig.