So I've been thinking for a while about getting a 12v power supply to make myself a little testbench out in the garage. I've got a pile of car audio stuff I want to put on eBay, but I want to test it all before I ship it off. So I got on eBay and typed in "12 volt power supply" and got a few hundred hits. Thats why I'm here. I don't have the slightest idea what is a good brand and what is a bad brand. That test equipment stuff is not my area of expertise. Anybody have experience with this? What should I buy? And how many amps? I was thinking 30-40 so it could hang with some of the bigger amplifiers I would hook up...does this sound about right? THANKS!