Athlon 64 X2 4800+
http://www.newegg.com/Product/Product.asp?Item=N82E16819103544
it's dual core, which will be very useful in future games like UT2007. and you should be able to get minimum 2.6-2.7GHZ on it (that's with stock cooling)
the X2 4800+ performs about the same as the FX-57 in single threaded apps, but about double as good in multi-threaded apps
or an FX-60 in socket M2 if you want to wait
DFI NF4 SLI-DR.
http://www.newegg.com/Product/Product.asp?Item=N82E16813136151R
the DFI NF4 boards hold records for overclocking. Asus only matched it recently with its board, but this one is less expensive
but don't get the expert board.
2GB OCZ Platinum PC4000 RAM
http://www.newegg.com/Product/Product.asp?Item=N82E16820227225
this is the fastest 2GB set of RAM out. you should be able to overclock well using these aswell.
the 256MB 7800 GTX's are roughly equal to the X1800 XT's, however the 512MB 7800 GTX's will beat them.
http://www.newegg.com/Product/Product.asp?Item=N82E16814143044
this one's stock overclocked aswell.
Creative X-Fi sound card. it will actually give you a performance increase in gaming over any other sound card, including the Audigy 2's
http://www.newegg.com/Product/Product.asp?Item=N82E16829102190
hard drives: 2x Seagate drives in a Raid 0 (whichever capacity)
2 drives in a Raid 0 will make them faster
plus possibly a WD 36GB or 74GB Raptor drive for your OS and programs to run on
speakers: Logitech Z-5500
http://www.newegg.com/Product/Product.asp?Item=N82E16836121120
these are among best speakers out for PC's
monitor:
http://www.newegg.com/Product/Product.asp?Item=N82E16824197011
what you chose before
DVD burners:
2 x LG 4167B drives
http://www.newegg.com/Product/Product.asp?Item=N82E16827136071
I have a 4163B, which is an earlier model. it is very fast, very quiet, and burns all types of CD's and DVD's.
printer:
http://www.newegg.com/Product/Product.asp?Item=N82E16828102174
I have the iP4000, and love it. it's fast, quiet, and ink cartridges are cheap.