If you aren't sure about putting it together, i can guarentee a computerlounge prebuilt will be a good bet. They have awesome service and do good quality builds (eg good cable management etc). Shipping is free also, as is the credit card fee.
If you've never built a computer before, well theres a first for everything, but prebuilt is an option.
Eg, this rig is a good option
and it uses almost the exact parts you've chosen at a pretty good price of $1,667.25 (theres a 5% discount for buying online off that marked price). If you want the 4870 instead, hit configure and swap it out, as with any other part.
| CPU | Intel Core 2 Duo E8500 3.16Ghz + Thermalright True Black 120 Cooler | More |
| Motherboard | ASUS P5Q PRO ATX INTEL LGA775 P45 | More |
| Memory | Corsair TWIN2X4096-6400C4DHX 2 X 2GB DDR2-800 XMS2 | More |
| Additional Memory | None |
| Hard Disk | Western Digital 640GB Caviar 3 Gb/s 16 MB Cache 7200 RPM | More |
| 2nd Hard Disk | None |
| Optical Disk | Asus DRW-2014L1T 20X LIGHTSCRIBE Black SATA | More |
| Video Adapter | ASUS Extreme ATI HD4850, 512MB GDDR3, PCI-E 2.0, TV-OUT, DVI, HDCP READY | More |
| 2nd Video Adapter | None |
| Sound Card | On-Board | More |
| Case | Coolermaster CM 690 Black nVidia SLi Ready No PSU | More |
| Power Supply | Corsair 620W HX Modular Power Supply | More |
| Keyboard | No Keyboard | More |
| Mouse | No Mice | More |
| Monitor | No Monitor | More |
| Operating System | No Operating System | More |
