Biased opinion, but Elise? Nothing else drives remotely like it (try one!). Exciting every time you get in (if you can get in, they're a bit tight for taller or larger folk).
If not practical enough, I'd go for a GT86 but not new, you'd save a packet by getting a low interest loan on a well looked after used model. Fun to drive at legal speeds, great driving position in my view and 'enough' power.
I considered an Elise, but at 5"11 and 110kg I will certainly struggle.