I also considered the BMW 135i, but too many owners have had consistant problems with the 135i's NPFP fuel pressure pump. As reported on their forum, the thing tends to go into limp mode unexpectedly and owners eventually need to have the dealer replace the unit sometimes several times. Get this, one loyal owner's response to complaints about the 135i's problems was "if you want reliability, get a Honda." That kind of turned me off.
I also considered the Infinity G37. A real beauty but not sinister enough like the GT.