I'm very new to this whole thing, though I've thought about the car PC Mp3player for a while now. I've heard about the Arise DC-DC convertors. Are these considered the best or most popular? Which model should I go with....and branching off this Q, how many amps does a PC with h/d and LCD roughly draw? I'd be using a P90, IBM 20GB, Seiko L4034 LCD, SB-16 soundcard, IBM 10T-T NIC. Thanks.