What's the best all in one pc for gaming?

Some would say the best PC is the one you build from parts you pick out yourself.

If you're looking for a pre-built system, look at Velocity Micro. They'll custom build your PC from the parts you choose, optimize and overclock it for you, then ship it to your home. You get a normal warranty although I've never had to use it.

Check out their website at http://velocitymicro.com.