Using only take2 pricing:
Corsair XMS2 Low-Latency Memory - DDR2-800MHz - 2GB Kit (2 x 1GB) Price: R 621
XFX AMD 8300 SLi Motherboard - Socket AM2 Price: R 1,114
GeCube ATi Radeon HD3850 - 256MB - PCI-E Price: R 1,016
AMD Phenom Tri-Core 8450 CPU - Socket AM2+ Price: R 1,087
Seagate Barracuda HDD - SATA-300 - 8MB Cache - 250GB Price: R 535
LG GSA-GH20L 20x LightScribe Dual Layer DVD Writer Price: R 286
Cooler Master Extreme Power PSU - 460w Price: R 491
iSonic Sidewinder Gaming Chassis - No PSU Price: R 548
Total: R5698
If you have your own chasis:
Total: R5150
If you want a quad core instead (AMD Phenom Quad-Core 9850 Black Edition CPU - Socket AM2+):
Total: R 6135
or the AMD Phenom Quad-Core 9550 CPU - Socket AM2+
Total: R 5729
I know those guys recommended Intel, but those are all dual cores. For a tri or quad core you can't beat amds pricing.
This build was initially for someone on a tighter budget. Since your purse strings aren't so tight I'd Heavily recommend the:
GeCube ATi Radeon HD4850Pro - 512MB - PCI-E Price: R 2,165