Scale back on the CPU and get the 6400, it will OC nicely and outperform the 6600 while saving you some money.
DDR2 800MHz RAM is very expensive right now, $350 minimum for 2Gig's of quality memory with low latency.
667MHz will save you money and OC's nicely as well, just make sure you buy from a 1st Tier manufacturer.
1Gig would serve you well with XP, if you switch to Vista then add another Gig of RAM because Vista requires 750Mb of RAM just idling and leaves you with 1.25Gig to run programs and such.
The X1900 will provide plenty of gaming fun if you can find one.
Get 3 HDD's and configure RAID5 if you want Speed and Security,
SerialATA has maximum transfer speed of 3.0GB/s, there are no stability issues to speak of when configured correctly.
Intel makes a fine MOBO to match their CPU's (imagine that) and your 975 chipset choice lands here, http://www.newegg.com/Product/Product.asp?Item=N82E1681...
Good luck, keep us posted
Cheers for the link MP, makes for good reading, as you probably guessed hadn;t thought about PSU just blundered on thinking waould use the old one, lol.
Couple of new questions.
RAID5 - does that give me the ability to swap out a drive if one fails? I thought that was only poss with 5 disks.
I have a water cooling sys that currently fits my athlon xp 3200 on an Abit NF7-S board, any chance this would fit the conroe? It has a large flat surface, but I suppose it is the attachements that are the important bit. Will post more details soon and ??a pic.
I would recomend a cheaper graphics card because the DX10 cards are comming out real soon, just get something in the midrange untill then.
Did i miss something here since when did intel start allowing OCing on their motherboards, perhaps since the EE came out and they took the multiplier lock off? interesting news if so, intel always was a stickler about OCing, and never supported it in the past, someone update me on this one.
Lower the CPU to an E6400, and get 2GB RAM. Also, that £615 setup you have is only a CPU, MB, RAM, GPU, and HDD. You forgot a case, power supply, and optical drives (not to mention OS, but that isn't necessarily an expense :wink: ).