Aye my current system is

AMD x64 dual-core - 2gb ddr2 ram - 7900 GS vidcard - old-ass IDE 120gb drive, single monitor @ 1280x1024 desktop res, WoWs @ 1024x768 and I run 5 of them fine out in the wild...but god forbid I get near a Major City...I went to Exodar for my Fire Totem quest recently on my quint-set of shamen...there were barely any people there and the lag went apeshit on me, I LOST /follow on 3 of 5 alts at random intervals...I don't even want to think about SW IF or Shattrath...*shudder*; having a better system promotes more stability/stable numbers in fps and such, though non-horizontal span/double monitors/double vidcards makes things worse instead of better for some reason.

And again, Dell sucks ;p I dunno if I'd say e-machines is any better(cuz my emergency backup comp is one...and oh god I hate that thing so much) but you really are best off custom-building if you want shit to work and to work right/well lol