Need help building my first Rep Rap (no replies)

Hi, I am currently building my first rep rap, and decided to go with the Prusa Mendel i3 rework. One of the doubts I'm having is the power supply. I found this one on eBay:

[www.ebay.com]

Will this work? I am using RAMPS 1.4 with the StepStick A4988 Stepper Driver, and a heat bed.


Another question is if these stepper motors will work for my rep rap, and what is the difference between them?:

[www.alltronics.com]
[www.makerfarm.com]

Any help will be appreciated!