Let me clarify a bit...I understand BMW's are great right out of the chute, but it has been my experience that they don't age gracefully. Emanuel has newer versions, and I am sure they are bulletproof, but, as they get older items such as plastic water pumps, brittle plastic radiators, multiple sensors and "lifetime" GM transmissions (Yes, that is right, GM makes the auto transmissions for BMW and the sole reason you hear to avoid them because they are the weakest point of the car.) that will definitely fail at one point. I expected a bit more quality than I got. My 1990 Porsche was a definite step up from my current 1995 325is, no doubt, hands down. Then again, the BMW is easy to drive, gets me up the 405 everyday and has luxury features that the Porsche did not have.
As for a new 4 door sedan...The Infinity is attractive, the S4 is nice, but for some reason I like the S60 T (high output) from Volvo. It is unique, yet attractive.