First off, welcome to the forums.
I know the airbrush kit you are talking about on Ebay. Personally, I would recommend against it. Not because of anything bad about the kit, but I believe you might out grow it's usefulness quickly. When you do, you will be left with a compressor and airbrush sitting in the closet, after you upgrade to a better one.
I have a Badger Cresendo 175 and an Aztek A470. I love my A470 although you will hear others talk bad about it.
This would be a good set if you can afford it: http://www.testors.com/catalog_item.asp?itemNbr=2206
If you can't afford that, I would look into less costly Aztek A470s or Contempos. You can set these airbrushes to act as single action airbrushes until you feel comfortable with double action. The only word of caution is really clean the airbrush good after each use. Here's a link to Aztek airbrushes: http://www.testors.com/catalog_brand.asp?brandNbr=1&ictNbr=10
You can also check out these sites:
http://www.airbrushcity.com/
http://www.dixieart.com/
Any other questions, just let me know.
Jesse