Thanks for all of the input I've received (and some very gracious offers from boarders willing to do some research), I finally pulled the trigger and traded my '01 X5 4.4i on a newsed 4.8is
Particulars:
2005 4.8is
Sapphire Black with Black Leather
Navigation System
4800 miles
They all have all the bells and whistles, so no need to go into too much detail there, I suppose! I got it for $61,900, so it's a decent deal, but not fabulous (I wanted to pay 60k even for it

)
The original owner is a affluent man in Cincinnati. He bought the X new, but traded it a week ago for a Z8. He never drove it, so he thought he could be with out it. Oddly enough, he's a very well known Porsche race car driver! (Can we say Cayenne? No....)
I didn't CPO it, because I never keep a car that long, so for me, it didn't make a ton of sense. I did the records check, and it also had no blemishes at all. It needs a couple things like the infamous water in the headlights that X5's are good at, but other than that, it's fantastic.
I'll post pics when I can get it clean enough not to be embarrased