Re: new mobo to replace the stock dell's
You should be able to upgrade the motherboard. They're pretty much universal fitting depending on the form factor. In the end, you'll probably end up upgrading most of the components from Dell. Enough to the point where you realized you just built a new PC, lol. It happened to a co-worker of mine. Started out with a little RAM upgrade for his Gateway. Then got a new motherboard, video card, and got a new case because the stupid Gateway case has proprietary fittings that prevent you from installing drives in some of the bays.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?