If my beloved Z4M ever blows up (those rod bearings/VANOS yo), I'll have a serious decision to make regarding building it back up or just moving on to something else. I have no need for two cars, so I'll most likely just stick with one. The only cars out there right now that even remotely interest me are the GT350 and the Romeo 4C Spider, obviously for different reasons. I keep dreaming BMW will make another nice Roadster, so I guess I'll hang around and see what's up with the next Z4/Z5 whatever, but from what I've seen it just doesn't look too promising.
Hopefully my S54 keeps ticking away however and solves the problem for me.