The regular name brands gaming rigs are indeed a nice thing to see. Alienware is in all honesty overpriced. Heavily name bran tax'd if you know what i mean. But the dell/hp offerings are indeed full of decent parts at a reasonable price.
I dont have a large monitor, so for me this ought to work just fine 
I'm building a friend a gaming rig around the 9800 series from scratch in the coming weeks. 2k total costs, and if ever(somehow) he needs to upgrade it'll be another 9800 and turning sli on away from being back on fire