The computer, including the monitors and extended warrenties on parts came in at right around three grand - the Quadro FX3800 ain't cheap ($800.00). I upgraded my Avid Xpress Pro to Media Composer 4.0.2 for $500 as part of Avid's current deal. The Adobe Production package, which includes Photoshop, AfterEffects, Premier, Flash and a bunch of other programs is in the $1400 range depending on where you can find a deal. I do this for a living, so it's all a tax write-off. I had to get into High Def in my home studio due to client demand.
It's funny, the last computer I built (five years ago) was state of the art at the time. I still use it for standard-def editing. It cost over $4800 in 2004 dollars. I figure the new computer was a steal.