According to my knowledge this would be a batter configuration for your new PC
Case: Aluminum-Black Raidmax Scorpio ATX PC Case with 420 Watt P4/AMD Dual Fan
Power Supply - 108.98 (excluding tax)
Motherboard: Gigabyte GA-7N400-L, nForce2 Ultra400 chipset - N82E16813128194
Sound card: Current one (SB Live! 5.1)
Video Card: ATI All-In-Wonder RADEON 9800 PRO 128MB DDR 8X AGP RETAIL - 385.00 N82E16814102297
Hard Drive: Seagate 120GB 7200rpm EIDE Hard Drive Barracuda 7200.7 ST3120026A - 103.00 N82E16822148022
Memory: CORSAIR 512MB PC3200 VALUE SELECT. VS512MB400 DDR RAM - OEM x2-184.00 N82E16820145026
Processor: AMD ATHLON XP 2500+ "Barton" 333 FSB PROCESSOR CPU RETAIL - 92.00 N82E16819103379
CD Drive/Copier: Currently owned.
DVD Drive: SONY DDU1612/B2 BLACK 16X DVD ROM Drive (48X CD-ROM Speed) -OEM 37.99 N82E16827131003
Power Supply: Included (Raidmax 420 watt)
Case Fans: Comes with it (5 x 80mm)
CPU Fan: COOLERMASTER AERO 7+ - 34.99 N82E16835103135
Floppy Drive: SAMSUNG 1.44MB BLACK FLOPPY DRIVE Model# SFD321B/LBL - OEM,
DRIVE ONLY - 8.50 N82E16821103203
Operating System: MS Windows XP Home Edition Complete package 1 user
Thermal Compound: Arctic Silver 3 - 5.99 N82E168351000031200ish