Adam,
I would have said you had 2 choices an eco-car (already done by Morgan) or the 3 wheeler, so your spot on with the choice.
Now you challenge will come in keeping the traditional Morgan lines while giving it the power of an aero.
I'm sure if you pull together some ideas you'll get plenty of comments. Hope your not of a fragile disposition.
What ever you though don't let Boshly pick the colour scheme.
