I'll stick in my 2p's worth as my GTV is going at the end of this week to be replaced by a Boxster S.
350Z: sold my first GTV V6 to get one of these. Kept it all of 8 weeks. Good car but very one-dimensional - no hidden depths to learn and explore. Quicker than the GTV and better handling. Nasty plastics inside.
S2000: swapped the 350Z for one of these. Again, good cars but found the interior very cramped after a while and you really do have to rag them to get the best out of them. Lasted 4 months before I traded it in for a Ferrari
TVR Tuscan: not as quick as a 4.5 cerbie but still mentally fast. Fabulous looks inside and out. Big boot, but removable roof panel/rear screen take up space and are a bit of a faff. Surprisingly easy to live with as a daily car provided you can stomach the bills. Very fast steering (1.7 turns lock-to-lock) takes some getting used to and makes the car feel a bit nervous at the front. Sounds awesome with carbon cans fitted. Mine went after the engine blew at 14k miles, 2 months out of warranty - oh, what fun that was
Would still have another if circumstances were right.
TVR Chimaera: still have one of these, though only a 4 litre. Heavy steering, clutch etc. Looks great, interior lovely but definitely old skool. Lots of grunt low down but not that quick in the grand scheme. On a par the a V6 point-to-point.