I Still Haven't Figured Out What Power Supply To Use

I watched this video the other day, and it had some interesting tidbits about building a big delta printer.  For one thing he recommended against using a regular ATX power supply, but I don't know what else you would use?  

I was worried about having a really long Bowden tube, but this guy has a meter long one and he says he doesn't have any problems with it, so that's cool to hear.  I'm waiting on a meter of Bowden tube myself right now, that I ordered on Ebay several weeks ago.

I also like his extruder. And the files to print it are open source.