Ever the advocate of cross country car buying, I would encourage you to look at SDWhitney's car. (I am not the only one who thinks this way. Kent Carlson's car in Utah is going to have a new home on the east coast). SDWhitney's is beautiful and already wonderfully modded. It is always good to buy from an enthusiast who has loved the car and taken good care of it. And there is a lot to be said for a CA car that hasn't known salt.
http://www.bimmer.info/forum/showthread.php?t=13877
Dinan chip, Bilstein sports w H&R, RD sways, RD strut brace, 750 bushings, Zimmermans/MetalMasters, O.E. M Pars, Eisenmann muffler