Nick, welcome, I used to own a 96 Plus 8 which was lovely, lots of power, but heavier to drive. I recently changed to a 3.7 Roadster, during this process I drove several cars. The plus 4 I found to be nippy and fun to drive, in fact I would say the plus 4 tourer Sport with Suplex was superb if you wanted a compliant and comfortable easy to drive trad Morgan, a great touring car. I drove several S1 and S2 Roadsters, lots of go and depending on wheels/tyres a good drive, however I drove one S2 and just hated the gearbox, slow and clunky and would have driven me crazy, I am not sure but I believe they can vary in this.
I ended up in what I have because it has lots of power which I like, but is still easy to drive, 15" wires with 205/65 tyres, adjustable koni shock absorbers all round, and brake reaction bars (I negotiated the shockers and reaction bars in the deal) the rest is standard. It's easier at low speeds due to electric assisted steering, and it has a lovely 6 speed box. A great and comfortable Morgan that can be very fast.
Depending on your budget I would try Plus 4s and Roadsters, if you can find one try a Roadster with 15" wheels they feel slightly different IMO. Whichever you test drive take careful note of the gearbox and whether it's notchy, also depending on your driving style whether you find you need to change gear more than you'd like or not.
I hope this helps, the car will find you.
