I'm in the market for a good game design computer, any recomendations?

I understand that game design is very vague so let me clarify, I want a computer that is good for gaming, high processing power, it CAN NOT have an integrated video, it MUST have an expansion slot for a video card (PCI for example) and a good video card. I want at least 2 GB of Ram at the bare minimum, 4 is better, 6+ is best, 8 is ideal. Dual or quad core processors, not some celeron processor with no cache. The programs I will be using the most are, Illustrator, Photoshop, Flash, Maya, and zBrush, along with that I'll probably be doing some coding and scripting also. I don't think I really need to mention any of the other things I'll be using it for, cause if it can do all this, it probably can do anything else, and just to be safe let's raise the cost to anything under $2000, I hope this helps you help me.