Best choice for an AMD Athlon XP 2700+ thats what I'm getting...you have your choice between thorobred and Barton though, and I'd recommend, and am getting, a thorobred.
The mobo I'm in love with is the Asus A7N8X Deluxe, but you're present decision is just as good.
If you're gaming you'll need MUCH better memory! DDR400 PC3200 512MB and you'll need 2 sticks of it. Make sure what kind of DDR and PC your mobo supports first though...get Kingston HyperX 512MB DDR400 PC3200 you can get two sticks for a REALLY good price http://www.kingston.com
Hard drive...Seagate Barracuda, Western Digital, Matrox, or Maxtor, they all make great hard drives, a bit pricey with WD though...Maxtor seems to be on most people's, and my, A-list...for gaming, get a Maxtor Ultra Series 80.0GB 7200RPM 8MB Cache http://www.maxtor.com
With the DVD-Rom, make sure its a CD/DVD-Rom so you can run both CD and DVDs...for the CD read speed, you'll need 48x or higher...For DVD read, I'm getin' 16x...you'll find pretty good drives under $100...
CD-RW...I heard a while back that Plextor makes the best. I might get their PlexWriter. For burning I'd recommend a 48x/24x/48a somewhere along there and its less than $150 http://www.plextor.com
or newegg to find regular, basic stuff. Teac brand is as simple and cheap as it gets, but I can't find one in a black/gray/silver color. Same for Mitsumi brand...
To save money, just get a case with two fans in back, one on side, and a fan or airflow in the front of the case. anymore fans is a plus, but to your specs, not needed.
Creative Labs makes the industries top soundcards...The SoundBlaster Audigy series is quite popular, with your choice between Gamer edition, MP3+ edition, etc...Or you can get an Audigy 2...it goes up to Platinum Pro...if you're like me, and you're gonna begin studio work, I'd get the Audigy 2 ZS Platinum. http://www.creative.com
they also make some of the top speaker systems...
As for speaker systems, my best experiences come with Klipsch ProMedia speakers, but you have your other top brands like logitech and altec lansing and creative labs/cambridge soundworks, etc... http://www.klipsch.com
as I'd recommend...
Logitech or Microsoft make good mice...get a Logitech MX500 Optical...please, in my opinion, and do take my advice, stay away from wireless/cordless pricey keyboard+mouse sets! Optical or the old ball technology is best for gaming, and my experiences with many diff wireless have shown me that cordless sucks!
I can't seem to find a simple, good keyboard under $50, and thats all I wanted, so http://www.keytronic.com
can provide you. Just browse their selection.
You'll want your power supply to stay between 420w and 500w...you can get a case with a power supply with it.
If you're gonna buy fans sepearatly, I've heard enermax is a top brand. http://www.hardcorecooling.com http://www.koolance.com
and if you want, you can find Arctic Silver 3 on pricebrabber or summit...
Save your money on the videocard. Get an ATi Radeon 9600Pro or an Nvidia 5600. Both 128MB AGP from what I've heard ATi seems to be the better with games right now, and especially if you wanna play Half-Life 2
If you get a dial-up modem, U.S. Robotics, 3Com, or Creative Labs makes pretty good stuff. Get a v.92 and if you're getting DSL or Cable, you're installer should give you a modem.
This is what I'm probably getting:
Monitor: NEC AccuSync LCD7V or NEC MultiSync LCD1760NX
Mouse: Logitech MX500 Optical
Keyboard: KeyTronic E03600QLPS2B-C @ KeyTronic.com
Motherboard: Asus A7N8X Deluxe
CPU: AMD Athlon XP 2700+ Thourobred @ newegg.com
Videocard: ATi Radeon 9600Pro 128MB AGP
Soundcard: Creative Labs SoundBlaster Audigy 2 Platinum ZS
Memory: 2 sticks of Kingston HyperX 512MB DDR400
PC3200 @ Kingston.com
Hard Drive: Maxtor Ultra Series 80.0GB 7200RPM 8MBCache EIDE ATAPI/133
CD-RW: Plextor PlexWriter 48x/24x/48a EIDE ATAPI @ plextor.com
Speakers: Klipsch ProMedia 2.1 @ klipsch.com
OS: Windows 2000 Professional @ microsoft.com
edit: oh yeah! make sure your floppy, cd/dvd-rom, cd-rw(if you want), hard drive, are EIDE ATAPI.