Another cheap charger that can do up to 5s Lipo or 14 NiMh cells at up to 5amps is the Multiplex LN-5014 (there are other brands that sell this same exact charger). Here's a link to a cheap power supply:
http://www.emtel.com/search/product_...t_id=EMV15012V
Flightpower cells are sold as other brands. They are made by Enerland, and come in Polyquest, Hyperion, Duralite, and other brands' packs. There are also lots of other choices, and IMO, your choice is all about what you want (like price, customer service, quality, etc.).
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz