first, +10 to craig about the 325iX.
second, i'm offended that you claim that you cannot find a decent BMW for under 10k. i'm sure many, if not most, on this forum payed less than 10k for theirs (particularly E30s, E34s, and many E36s).
third, you can handle up to 500hp? BWAHAHAHAHAHA! ...nuff said.
finally, +1 to greentourer; my dad has an 850R (not the wagon, though). it's a blast - i used to drive it to school before i had mine.