I struggled with this decision recently. I was tired of the repair costs, but loved my car. I went out test drove several cars, including 2010 BMW M5, and M6's, 2012 Audi S5, 2010 Jaguar XK. I went with the 2010 Jaguar XK and love it. In light of the problems and repairs I did a many on my 2007 BMW 650i (I bought her with high mileage, so I knew there would be repairs) This time around I went low mileage and bigtime warranty, grin!
I loved my 2007 BMW 650i, but I had her replaced with a Beautiful 2010 Jaguar XK Coupe.