Expensive... You really don't need that much of a power supply. This is the one I use:
http://www.emtel.com/search/product_...t_id=EMV15012V
It's cheap, pretty small, and works well. Unless you will be charging at 10amps all the time, it should work well for you. Besides, charging a 3200mah pack at 10amps would be over 3C, which would reduce the battery's life.
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