What is your dream computer,don't even think about,just choose the parts you want.
Here is mines:
I went to Tigerdirect.com to find them
case-Thermaltake Spedo VI90001W2Z Full-Tower Case - Clear side with 230mm Fan, Top 230mm Fan, Front USB x2, eSATA and Audio Ports, Black
processor-Intel Core i7 940 Processor BX80601940 - 2.93GHz, 8MB L3 Cache, 4.8GT/s QPI, HypreThreading, Quad-Core, Bloomfield, LGA 1366, Retail, Processor with Fan
hard drive-Seagate 1.5TB SATA HD/Win Vista Ultimate 64 OEM Bundle
memory-Corsair Core i7 Dominator 6GB PC12800 DDR3 RAM - Tri Channel, 1600MHz, 6144MB (3 x 2048MB), DHX
video/graphics card-Diamond Radeon HD 4870 Video Card - 1024MB GDDR5, PCI Express 2.0 x16, CrossFireX Ready, (Dual Link) Dual DVI, HDTV