As others have said, take your time, enjoy the prosess, drive different cars. But in my opinion:
4/4 for morganeering on a budget (if such a thing exists), light, nimble but perhaps a little low on power for longer cruising
+4 might be the best bang for the buck, nice kombination between weight, "chuckability", power and price
Roadster for effortless cruising with a superb engine and loads of power. If you get an S1 also with a superb gearbox. Rare and possibly expensive.
+8 for classic V8 rumble and torque, torque, torque. Not as well balanced as the Roadster, though, sometimes cooling difficulties and generally an old-fashioned engine. Seems to be many's favourite, though.
