Hi Maidson, I'll throw my 2 cents in on this! Definitely pass on the Studio Colors. Big movers are fun when they work, but unless you know your way around the inside of one they'll spend more time in the shop than out on jobs. You'll also be sinking more money into the upkeep of them, especially if you need to pay someone to do even simple repairs for you. Another thing to keep in mind is available power. You can only put 3 Studio Colors on a 20A circuit whereas you can group many more LED movers like the American DJ Inno series onto the same single circuit. 32x20ft isn't a small stage, so I agree with the others - spend your money on good primary lighting first (whether it's LED or halogen), and add the eye candy later as your budget allows. If you're forced to shoot the lights from a close distance, beam spread is also an important thing to take into account and the ADJ Dotz / COB products are hard to beat for very wide coverage.
In regards to a controller, the PC-based solutions are certainly your best bang to buck. MagicQ PC has always been my preference, but others have their own opinions. The nice thing is that most of these programs are downloadable for free to at least demo and see if it feels right to you. Good luck with the project!