EDIT:
I have decided that a possible update to a AMD X2 in the furture would be an idea. Therefor SKT939 is the way to go… and a nice shiny FX 57 (failing that, a FX 55) with 2x160gb SATAII in RAID0 with a Nvidia 7800gtx.
Now I will decide on MOBO, and RAM. I think the A8N Deluxe SLI is a sound choice, but a MSI K8N Neo4 Platinum performs better in benchmarks… hmmm!
As for RAM. I found a little gem in a MUSHKIN PC4000, check Mushkin Redline Memory Raises The RPM's - Legit Reviews
Tell me what you think.
Ill leave the below in, just incase anyone wants to read it .. 
This has helped loads, nice one guys.
As far as I can see, the ATI card will not give my system enough of an adge to make it worth the extra over the Geforce. That doesnt matter, Im sure I will change it after a year for a Crossfire and I know who I will sell the 7800GTX to already! 
As for processor… I have been out of the loop for a while but… AMD with ONLY up to 3200 without overclocking… that sounds bad. I built my friends computer recently with this, it does perform, but would it not be worth getting an equivalent Pentium with DDR2 500? And I realise the cost difference between Dual cores, but I intend to hold onto this system for quite-some-time (old one is nearly 3+1/2 yrs old). So, I am expecting software technology to catch up with hardware to produce massive performance increases (esp when background processes are concerned) with X2. Is this not likely to happen VERy soon??? Also, this will leave me open to rendering/video streaming BEHIND my a game (MASSIVE bonus for me), or am I very wrong?
I think the 160s with RAID0 will suffice, as I would like the storage space and will succumb to the slightly slower loads. It will still be an improvement over my old IDEs with my 1.3 AMD sob. But what about SATA2? I could not locate a decent SATA2 HDD for my friend while building his system. Admitedly he wanted it all bought in one, mainstream shop
.
Anyway, I pretty much know where to head with this. I am, however, really worried about my processor choice. I can see the Pentium being outdated as soon as 64bit operating platforms take off. This makes the AMD 64 X2 a good choice, but without supporting DDR2 or higher FSB, will they not get a bit left behind in memory and speed performance? Esp when latency timings can be improved for DDR2. I will need guidance on this.
That will obviously dictate what type of MOBO I will have.
So for AMD: Asus A8N-SLI Deluxe with DDR400 OCZs = a good choice, no?
(I dont want to but…) Suggestions for a Pentium rig?
Thank you very much for your time & help.
-Tag