I owned an mx5, then z4 e85 3.0 now boxster s 987. I think the boxster lies in between the mx5 and z4 in terms of comfort and sportiness. Any later z4 will be even more of a grand tourer. The TT is way too heavy for me to even consider as a roadster. Jaguar F type is good value but also very heavy. I think my next steps will be newer boxsters.