Ok i went majorly over the top with this but you can always downgrade anything there, this will handle a lot...
CASE
Sky Hawk/Eagle Tech Matrix Silver/Blue Aluminum ATX Case with Motor Drive Door, Model "PSR5605W-BL" -RETAIL
http://www.newegg.com/app/ViewProductDesc.asp?description=11-117-034&depa=1
$72.99
FLOPPY DRIVE
NEC 1.44MB Black Internal Floppy Drive, OEM
http://www.newegg.com/app/ViewProductDesc.asp?description=21-152-005&depa=1
$8.00
KEYBOARD AND MOUSE
Microsoft Wireless Optical Desktop Elite - RETAIL
http://www.newegg.com/app/viewproductdesc.asp?description=23-109-131&DEPA=1
$77.00
CPU
AMD Socket 939 Athlon 64 4000+, 2.4 GHz, 1MB L2 Cache 64-bit Processor - Retail
http://www.newegg.com/app/ViewProductDesc.asp?description=19-103-497&depa=1
$539.00
HDD
WD Caviar RAID Edition Series 250GB 7200RPM SATA Hard Drive, Model WD2500SD, OEM
http://www.newegg.com/app/viewproductdesc.asp?description=22-144-179&DEPA=0
$144.00
SOUNDCARD
Creative Labs Sound Blaster Audigy 2 Value Sound Card, Model "SB0400" -RETAIL
http://www.newegg.com/app/ViewProductDesc.asp?description=29-102-175&depa=1
$62.00
It seems to come with Splinter Cell too
a great game for audio
MOTHERBOARD
Abit "FATAL1TY AN8" NVIDIA NF4 Ultra Chipset Motherboard For AMD Socket 939 CPU -RETAIL
http://www.newegg.com/app/ViewProductDesc.asp?description=13-127-196&depa=1
$205.00
RAM
Mushkin Dual Pack 184-Pin 1GB(512MBx2) DDR PC-3200 - Retail
http://www.newegg.com/app/ViewProductDesc.asp?description=20-146-299&depa=1
$85.67
TV Tuner
Leadtek PCI TV/FM Tuner Card, REMOTE, Model "WinFast TV2000 XP Expert" -RETAIL
http://www.newegg.com/app/ViewProductDesc.asp?description=14-122-180&depa=1
$49.00
Graphics Card
ASUS nVIDIA GeForce 6600GT Video Card, 128MB GDDR3, 128-Bit, DVI/TV-Out, PCI-Express, Model "EN6600GT/TOP/TD/128M" -OEM
http://www.newegg.com/app/ViewProductDesc.asp?description=14-121-531&depa=1
$246.00
Power Supply
OCZ ModStream 450W Power Supply with OCZ EZMod technology, SATA Connector, Model "OCZ45012U" -RETAIL
http://www.newegg.com/app/ViewProductDesc.asp?description=17-104-154&depa=1
$80.00
Speakers
Klipsch ProMedia ultra 5.1 Personal Audio System
http://www.newegg.com/app/ViewProductDesc.asp?description=36-119-106&depa=0
$332.49
$1900.15
Ok maybe a little over the top but yea... switch any parts