ehh... why would you spend tha tmuch on a PSU??

go look for deal on computer ATX power supplies with single or dual 12V rails.

I bought a dual rail 500W ATX PSU, that's 85% efficient, with modular cables, and made my own connector.

After rebate it costed me 35 bucks. and it supports 2 X 12v 20A rails.

these computer PSU will be more stable than any of the above mentioned.

You can get a mini ATX aluminum case while you're add it and bulid your own chargin station.