I have a Wii, need advice on a PC

For console gaming I'm pretty much a Nintendo guy, but I want to build my own PC or buy one that's not too expensive but that is pretty powerful to run Photoshop and Illustrator (i'm an Industrial Design major getting my portfolio ready) and as a side benefit be able to run CS Source/ Warcraft III, maybe a 3d Starcraft on it.  I know these games are kinda dated so it wouldn't be top of the line, but was interested in what web sites are good to buy individual PC components from (vid cards, motherboard, etc.  Sorry this is a little OT, I figured there are lots of techies in here who would know.

if you live in the US.

newegg.com is probably the best. 

http://www.circuitcity.com/ssm/HP-Pavilion-Desktop-PC-A6009N/sem/rpsm/oid/178512/catOid/-12962/rpem/ccd/productDetail.do this is the pc i have its very good for the price and it plays WOW flawlessly i recommend you buy this pc since your not gonna be playing graphicly intense games like quake or crysisfamousking

[QUOTE="famousking"]http://www.circuitcity.com/ssm/HP-Pavilion-Desktop-PC-A6009N/sem/rpsm/oid/178512/catOid/-12962/rpem/ccd/productDetail.do this is the pc i have its very good for the price and it plays WOW flawlessly i recommend you buy this pc since your not gonna be playing graphicly intense games like quake or crysisfamousking