At first, I thought this thread was a little weird, but I can certainly relate.
Having owned a few BMWs, an e46 M3 and an e90 335, I would have to say the two happiest moments for owning each of these cars was the day of obtaining them, and the day of SELLING them. They're fun cars to drive, but they do have their share of glitches that you can comfortably deal with while they are under warranty. Out of warranty? Good luck, my friend, as repair costs can cost you a rMBP!
I've scaled things down in the car department and went for non-luxury type brands and opted for "fully-loaded" options.
For myself, I've had a passion for technology, so the choice for me here would be getting the rMBP.