If you're not comfortable building your own desktop PC, find a good local computer store that builds their own and stands behind their work. You'll likely be happier with it than any of the national brands, even if you end up spending a little more. If there's a Fry's near you, you can build your components from them and pay them to build it for you. They stand behind their work too.
I think I covered that in my initial summary. BTDT, not going down that road again. Too many expensive and painful scars. Just want the damn computer to work and if it breaks, someone to come fix it pronto. It's just a tool for me, no matter that it is one of the most frustrating parts of my existence. <~>
P.S. For laptops, I'll stick with my Toughbooks. If it is going to survive me, it's got to be tough and Coke proof.