Hi, I am currently looking to build my first computer for when I go off to college. I want 2 screens and the computer will be mostly for gaming (EX. Boarderlands 2, Skyrim, Diablo III). I'm going to be an engineer and it would be nice if it could handle some light AutoCAD or Inventor work with small assemblies with <10 components. I want to get the card for under $200 if possible, I'm out of my depth right now any help would be greatly appreciated, thanks
Other components
Intel Core i5-3570K 3.4GHz Quad-Core Processor
Mushkin Blackline 32GB (4 x 8GB) DDR3-1600
2x Seagate Momentus XT 750GB 2.5" 7200RPM Internal Hybrid Hard Drive
Also,Is it true that I have to use GeForce because I'm going with an intel?

Other components
Intel Core i5-3570K 3.4GHz Quad-Core Processor
Mushkin Blackline 32GB (4 x 8GB) DDR3-1600
2x Seagate Momentus XT 750GB 2.5" 7200RPM Internal Hybrid Hard Drive
Also,Is it true that I have to use GeForce because I'm going with an intel?