Dell :: Need Warranty With An M4400?

I'm about to purchase an M4400 as a mobile editing station but I've only got one reservation. Basically, I can buy one with a dell 3 year warranty or I can buy a better speced one for 20% less that doesn't have a warranty as it's from a liquidation of assets sale.

Now, I'm pretty handy with computers/laptop and in the past I've taken apart laptops to replace CPU's, motherboards, hard drives, etc. so I'm fairly comfortable with fixing things when they go wrong. But my question is whether I should expect things to go wrong. I'm especially concerned about the screen and the occurrence of dead pixels. Is this commonplace and how many dead pixels does it take for dell to accept a returns anyway?

At home I have a Dell 2407WFP-HC and I've never had any problems with it. I built my desktop computer myself and I'm not concerned with parts of it going wrong as it's easy to find replacement parts, but the same can't be said for laptops, and there is a significant cost differential!

So, is it worth paying a 25% premium to have the dell warranty? I'm a frugal man, and a penny saved is always a good thing in my book, but not at the expense of having to shell out in 6 months when something goes wrong .....