Hi Tom
For what it's worth I would advise trying as many as you can get behind the wheel of, identical specification cars drive differently, some colour and trim combinations will appeal more than others to you but the case for most of us who have bought a used Morgan is the inescapable truth that the car will pick you and you will be a quivering jelly in its powers until the keys are in your pocket.
Welcome to the commencement of a wonderful period in your motoring life, prepare for mega smiles per mile.
Good hunting.