DFI LanParty UT nF4-D ATX AMD Motherboardhttp://www.newegg.co...N82E16813136159
AMD Athlon 64 X2 3800+ 1GHz FSB Socket 939 Dual Core Processorhttp://www.newegg.co...N82E16819103562
CORSAIR ValueSelect 2GB (2 x 1GB) 184-Pin DDR SDRAM System Memoryhttp://www.newegg.co...N82E16820145579
eVGA Geforce 6800GShttp://www.newegg.co...N82E16814130267
Microsoft Windows XP Home With SP2http://www.newegg.co...N82E16837102059
PLEXTOR Beige IDE DVD Burnerhttp://www.newegg.co...N82E16827131356
Western Digital Caviar SE 250GB 3.5" Serial ATA150 Hard Drivehttp://www.newegg.co...N82E16822144154
That stuff came out to be $1,060 at the time I posted.
** All you need is a case and power supply** I usually let the person pick out their own case because people have different tastes on cases. If you get the case that he listed above it comes with a good power supply already so just add $99.99 to the price of $1,060 and thats the final price. There is shipping cost of course, but thats everything. You can make the pc cheaper if you wanted by choosing a cheaper motherboard but I would keep the Dfi motherboard they are really high quality boards and plus you would be getting a dual core processor. Whatever you choose, Do NOT get a ide harddrive, make shure you get a sata (serial ata) harddrive. You can always get just 1gb of memory for now also and it will save you some money, I would definately get dual core now because it is future proof. On a budget build of under $800 I usually recommend the amd 64 bit 3200+ venice but there is much better like the dual core 3800+ x2 that I picked out for you. This system is not much more that the one he configured and its dual core and much faster and it will last alot longer. Dual core is the future.
Its all up to you bro. You make the decision, both are good systems but I can tell you this will last alot longer and is worth the money. The difference between the 6800gs and the 7800gt is very slim because the both have the same Gb/s "gigabytes per second" the 6800gs is the better and smarter buy.