I was bored, so here is a list of various recommended configurations for purchasing computers:
Workstation $370
ATX Case with 350 watt PS $30
Asus K8N-VM socket 754 $65
AMD Athlon 64 2800+ $115
1 GB Corsair ValueSelect PC3200 memory $82
Western Digital 80 GB $48
Samsung DVD-Rom/CD-RW Combo drive $30
Casual Gamer $1014
Raidmax Mustang Crimson Steel Case with 420 watt PS $54
Asus A8N-SLI motherboard $122
AMD Athlon 64 3500+ $206
1 GB Corsair XMS PC3200 memory $100
256mb eVGA GeForce 7800 GT $280
Creative X-Fi Xtreme Music $115
Western Digital 160 GB $75
Sony DVD-Rom drive $20
Pioneer DVD+RW drive $42
Hardcore Gamer $4,457
Asus Vento 3600 Red Steel Case $139
Enermax SLI-certified 600 watt All-in-One PS $148
Asus A8N32-SLI Deluxe $245
AMD FX-60 Dual Core @ 2.6GHz $1,339 (much faster than FX-57 for multitasking)
2 GB Corsair XMS PC3200XL @ 2-2-2-5 $404
Dual 256 mb eVGA 7800 GTX in SLI $898
Creative X-Fi Elite Pro $385
Western Digital Raptor (10,000 rpm) 150 GB $299
Dual Maxtor Diamondback 300 GB @ 3.0GB/sec $270
Highpoint Rocketraid PCI-Express SATA II Card $253
Sony DVD-Rom drive $22
Pioneer DVR-610b DVD+RW Drive $55
Recommended Accessories $2447
Logitech Z-5500 THX certified 5.1 surround sound system $210
Logitech MX518 Gaming Mouse $38
Dell 3007WFP 30" widescreen Ultrasharp display (max res. 2560x1600) $2199
Here are some images of the visible things on the list:
Logitech Z-5500 Speakers

Raidmax Mustang Case

Asus Vento Case

Logitech MX518 Mouse
Dell 3007FPW 30" monitor