I say go with the Homegrown Hydroponics system:

http://homegrown-hydroponics.com/growcabinets.html

Their customer service is really good. I spoke to some dude at 3am for over an hour before purchasing from them. I even called back several times after the unit was bought and paid for, and they STILL took the time to answer my questions, and had 0 attitude.

I considered the Sunlight Sheds Cool Cab, but the Homegrown Hydroponics systems smoked them in price and build quality! My friend and I both own Homegrown Hydroponics systems, and I am super happy with mine!

I'll be buying a Medium or Super Jumbo from them within the next month or two. The guy said he'll hook me up w/ a discount plus some freebees for being a return customer! Dang, I would have bought from them anyway!