really what is the price you wanna go max to.
but anyways
intel C2D4600 - 5K (suggested proccy C2D 7200 @5.5)
945 mobo 2-3K(2 models available) (suggested models as hellgate says and insist on original intel mobo and price limit is ok
Intel DP35DP
1 GB 800 MHz Transcend or Kingston - 1100
Sony DRU840A - 1500, 190A -1200
Monitor you have to decide
Logitech Keyboard Mouse combo - 700
UPS - APC-650VA 2.8K
Speaker 2.1 you need to decidealot of models available and you will get suggested alot. my suggestion in the basic front BXR 1121 - 1.1K I am actually thinking to buy this, do not wanna go more pricey models.