The current line of entry-level XPS desktops from Dell fit what you describe pretty much dead-on. I bought one earlier this year at 850, but I upgraded a couple things first. Even without upgrades it would do everything you list and play most games acceptably well, out of the box.
--sofaspud
--"Listening to your kid is the audio equivalent of a Salvador Dali painting, Spud." --OpMegs
--sofaspud
--"Listening to your kid is the audio equivalent of a Salvador Dali painting, Spud." --OpMegs