Racers Edge Solo 80:
http://www.racers-edge.com/Racers_Ed.../rcesc1800.htm
This is the charger I use for racing. I run 2 classes at times and I have no problems. This charger has a lot of good features, including a carrying case for the charger and adapters for the price. Personally, this is all the charger you need. Plus its AC/DC so you don't need a power supply. And it also has a 5 year manufacturer warranty for defects.
Look around for this charger as some places have this charger at a cheaper price.