"STOP with the athlon crap. Yes I did compare, And I am more happy with P4."
Hey, it's your descision, but I'd take a look at the 64-bit Athlon line before dismissing AMD. Fine if you don't believe me, but people specing out high-end gaming rigs for a living:
http://www.anandtech.com/guides/showdoc.aspx?i=2100&p=11And both an Intel and AMD system, the AMD system being the slightly cheaper of the two:
http://www.sharkyextreme.com/guides/MHGSBG/article.php/10707_3373781__8Even with people building shoe-string budget gaming rigs:
http://www6.tomshardware.com/game/20040529/game_machine-07.html#the_final_shopping_listBut again, your money, your call

"The number one priority is to have the CORRECT amount of RAM. Which would be 512 in your case. Sure you COULD buy a gig, but it is going to be wasted unless you are living and breathing photoshop."
Or play Unreal Tournament 2k4, FarCry, Battlefield 1942, DAoC/Eversmack, or plan on playing Half Life 2.
"Also, having a gig of ram will allow you to get rid of your pagefile."
I don't recommed ever shutting off your pagefile. Should you actually run short on memory, you'll get crashes and errors instead of temporary slowdown. Not to mention, why would you want passive running processes taking up RAM?
"Number two thing in how much you are going to like your computer is the monitor. Any 21" tubed monitor is going to be great. Anything else is less than ideal."
I agree with this. Monitors are the one thing you don't want to skimp on. You could have the best hardware in the world, but hooking it up to a crappy monitor will just make your games look like crap. LCDs are great if you use the DVI hookup, otherwise don't bother. I'd still rather have a nice and big flat screen CRT with a Mitsubishi or Sony tube though.
"Sound, forget it. I used to buy fancy sound cards, but they just don't sound much any different on stereo setups, and 4 speaker setups are easily accomplished with the older soundblaster lives. I used to run a "live" and 5 speakers, but it just got annoying, and I went back to onboard audio, sounds exactly the same."
The only reason I see to get top-end sound cards would be sound processing features like EAX. Playing System Shock 2 with on-board surround, and playing with EAX-powered surround is a world of difference. If features like that aren't important, skip the PCI soundcard and stay with on-board.
"Modems. I haven't bought a modem in years. They don't make hardware modems in PCI and current boards don't have ISA. If you need a modem then find an old external 56K one (serial port). If I HAVE to use one, then I will use a serial one."
The only hardware based modems to my knowledge is from U.S. Robotics because they own the patent, and they do still make PCI V.92 modems (
http://www.usr.com/products/home/p-home-menu.asp). Back in the day, they came out with X2, which was hardware-based compression. Lucent made their 56k system (k56Flex, or something like that), but it was software based compression. This was all back in the day of 166Mhz processors. Now, processors are SO FAST, it really doesn't even matter anymore. Unless you are running Photoshop filters on large pictures and listening to MP3s while trying to download a file over dial-up, I doubt you are going to get any download speed performance drops with a software based modem.