Hi I go into a Maya class for 12 days in April. I've some experience with 3d through Cinema 4d. Normally I'm a Avid Cutter but I'd like to go deeper into the 3d world. My question is about the Computer. I want to buy a new one, because my old Mac really sucks. And I want a PC again. Is DDR3 Memory really that better than DDR2 Memory? What kind of graphics card is the best choice? My budget is limited up to 800 EUR (I think about 1000 US$), which is not much!

Would be glad about some tips

Thank you very much!
kimsay