How about this?
I just ripped it straight from my thread
CPU: Phenom II 940
Motherboard: 790GX mobo
Memory: 2x2GB DDR2 1066
4GB of DDR2 is so cheap, so there's no reason not to.
PSU: OCZ 500W modular
500W is fine as I take it you don't overclock. Modular cables means you only need to use the cables you need, helps with cable management.
HDD: Here it is entirely up to the user's storage requirements, there are a few things to look out for though:
-SATA 3.0GB/s interface. This is the new interface standard and is a lot faster than the older PATA/IDE connection.
-Brand, there are lots of quality manufacturers: Seagate, Western Digital, Samsung, Hitachi etc
-Cache, even with a low capacity hard drive, I would recommend at least a 16MB cache for a build like this.
As for the space, that is entirely dependant on the user's requirements.
Disk drive: LG SATA
Case: CM RC-690
The case come with all the fans you need to provide good ventilation/airflow.
GPU: HIS HD 4870
Monitor: A 22" should be fine, this is a good deal.
I'll get the links setup.
All that comes to $720, which leaves you with $80 for the HDD, we can help you with this as well but it depends on how much space you need.