Praetor

Budget: <1600CAD

• Kingmax Value PC3200 2x512MB CL3 ($109.99)
• ASUS A8R-MVP [RX200CF] ($122.00)
• Nikao Black Case ($25.80)
• LiteOn SHW-1653S ($44.99)
• Athlon 64 X2 4200+ [Manchester, Socket 939 Lidded OmPGA, 2200MHz, ADA4200DAA5BV] ($425.00)
• Antec TruePower 2.0 TPII-430W [12V@34A] ($84.99)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Sapphire Radeon X1900XT 512MB ($619.99)
• Thermaltake Blue Orb II ($49.99)
• SUBTOTAL: $1599.75

The extra $100 allows us to finally hit the X1900XT and upgrade the system cooler.

Budget: <1700CAD

• Kingmax Value PC3200 2x512MB CL3 ($109.99)
• BenQ DQ60 ($46.99)
• ASUS A8R-MVP [RX200CF] ($122.00)
• Nikao Black Case ($25.80)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Athlon 64 X2 4200+ [Manchester, Socket 939 Lidded OmPGA, 2200MHz, ADA4200DAA5BV] ($425.00)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Sapphire Radeon X1900XT 512MB ($619.99)
• Antec TruePower 2.0 TPII-480W [12V@36A] ($95.00)
• SUBTOTAL: $1678.77

Losing the aftermarket HSF we've got a beefier PSU and a second 250GB drive.

Budget: <1800CAD

• Kingmax Value PC3200 2x512MB CL3 ($109.99)
• BenQ DQ60 ($46.99)
• ASUS A8R-MVP [RX200CF] ($122.00)
• Nikao Black Case ($25.80)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Athlon 64 X2 4200+ [Manchester, Socket 939 Lidded OmPGA, 2200MHz, ADA4200DAA5BV] ($425.00)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Sapphire Radeon X1900XT 512MB ($619.99)
• Thermaltake Blue Orb II ($49.99)
• OCz PowerStream 520W [12V@33A] ($148.00)
• SUBTOTAL: $1781.76

Here we've brought the aftermarket HSF back along with an upgrade to the PSU for even tighter regulation

Budget: <1900CAD

• Samsung SH-W162C ($45.99)
• ASUS A8R-MVP [RX200CF] ($122.00)
• Nikao Black Case ($25.80)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Athlon 64 X2 4200+ [Manchester, Socket 939 Lidded OmPGA, 2200MHz, ADA4200DAA5BV] ($425.00)
• Western Digital 250GB 16MB SATA-II ($117.00)
• Sapphire Radeon X1900XT 512MB ($619.99)
• Thermaltake Blue Orb II ($49.99)
• OCz PowerStream 520W [12V@33A] ($148.00)
• Corsair Value Select PC3200 2x1024MB CL2.5 ($229.00)
• SUBTOTAL: $1899.77

The extra $100 allows us to wrap this box up with an upgrade to 2GB of memory.

Bigger Budget?
Well the boxes are for the most part, maxed out in a balanced manner; yes there are more balanced configs possible but not without incurring a few hundred dollar jumps in between.

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ASUS P5K Premium WiFi-AP, Q6600@3.7 / ASUS P5ND, E6400@3.8
4GB OCz Platinum XTC 8500 / 4GB CorsairXMS2 6400
5x500GB Seagate 7200.10 / 2x500 Seagate 7200.10
OCz 8800GTX 768MB @ 630/800 / 2x Galaxy 8800GT SLI