I am currently using the Microsoft VGA cable on my Dell 2405FPW with a 1920x180 resolution.

It looks outstanding.

This monitor also has component inputs, but they are known to be a bit crappy.

The video quality on VGA is very crisp. The colors are accurate as far as I can tell. They are bright and even, with smooth saturation and value shifts. I think most problems with VGA comes form people not setting up their monitors correctly, or using a resolution setting on the 360 that is forcing their monitors to do wacky scaling.

My 360 looks better on this monitor than it does on many 40inch+ HDTVs I've seen, other tahn one or two DLPs.