Only Lipo batteries need balancing.
2 ways to go. Get any quality charger that will charge all your batteries and a seperate balancer that can be used while charging, like an Astro Blinky, or get a charger that balance charges.
I personally use a Bantam BC-5, it will charge every battery I have, including my field box'' gell cell and balance charges up to a 5s lipo.
Drawbacks, will only charge one battery at a time and requires a 12v power source (car battery or AC/DC power supply)
http://www.atlantahobby.com/shopexd.asp?id=6385
It does make a great field charger.