there are massive issues with this whole debate.
1.) the OP wants a conroe - that obvious, so you may as well just buy it.
2.) people think that a home PC turned on 24x7 is a server - no it is not.
3.) The OP thinks he can build a better file server with better cooling etc than a professional disk product
4.) The user does not have experience in the OS's required to make this a usable product and by his own words doesn't want to learn.
The answer is obvious - get a NAS box
the answer the user should chose is get a conroe - as its what he wants.