well seems you looking for a bit lower powered comp. and no real gaming. id say go for a Asus mother board about 100-150dollar whit a Amd quad a cheaper moddel + the Asus board is nice for low electrisity bill. amd is insanly good for its prise range. and well grapics up to you if you plan on no gaming or realy little, Then id go whit one whit no fanns will keep goin much longer and a lot more quiet.
mother board whit ddr2 can see the need for ddr3 and 6 sata good for storage
ASUS M4A785-M, Socket-AM2+/AM3 its around 100dollar
good quad 2,8ghz
AMD Athlon II X4 630 AM3 95W and around 150 dollar not to hig power con
4gig of ram is always a good idea but it depends whot os you going to run
Corsair TWIN2X PC6400 DDR2 4GB KIT CL5 about 175dollar
no fan and the specs seem to put out a bit of a fight at least ^^
rColor Radeon HD 4670 1GB GDDR3 about 99,8 dollar
524,8 dollar well power and cabinet i think youl be able to handle
500W will most likely enough
and in my years of hardrive owner my favorit has been F3 samsung 1T they are epic work horses and got a nice price tag to ^^. ceep in mind you can go for a sheaper cpu and gpu car if you like. but these to will pr not haw to struggle to much if you work whit it.
hope i haw given you some help and sorry for bad spelling