I have a good job, no mortgage, no wife and no kids
And yes, 4 million pixels is freaking awesome. I have wanted a 30" for a while but 1300 bucks for a monitor just wasnt plausible. 690, thats a different story
Also, when you upgrade as often as i do, your old parts are still usually worth at least 50% or more of what you paid for them, so its not as much out of pocket as you might expect.