I use PS power supplies for my stuff. I have gone through 2 of them that can't hold their voltage very well, but another that is rated at 20amps on the +12v line will hold MUCH better. Or, just buy this:
http://www.emtel.com/search/product_...t_id=EMV15012V
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