the waterfarms are pretty simple for beginners.

if you look though, you put one together yourself at a grow store for half the price.

5 gallon bucket black $7
basket $7
airstone (get the huge cylindrical gray ones) $3
air tubing $2
hydronton or coco (get a big bag. will last you a few grows at your size. for some reason I think you should start w/hydronton... others may disagree) $40

you could get one good compressor style pump at the grow shop and a manifold (highly suggested rather than many small crappy pumps that will die in 2 months)

2 grow shops I like are Way To Grow & One Love Garden Supply in Boulder.

If you like quick and easy and complete, I can see why starting with the hydrofarm product would not be a bad idea..