Welcome to the forum.
A lot depends on your driving style and how you will use the car. Our 4/4 suits us very well and provides sufficient performance to keep up with more powerful Morgans when touring through the Alps fully loaded but I have to change gear a lot more often than those in +4s and Roadsters which suits me and is a delight. It may not suit you.
Best thing is to go to a good dealer (Brands Hatch Morgans in your case I suspect) and drive one of each. After a few test drives, the right car will find you.
Last edited by Paul F; 11/09/17 07:12 AM. Reason: Added courtesy.
