Hi Tuftie,
My old Plus 4 was great, and if someone said 'That's the car" - I would be quite happy.
However, after two 3.0 litre Roadsters - I would not buy anything else!
I wouldn't br tempted by the 3.7, but would stick with the 3.0 litre.
Try the Plus 4 and the 3.0 litre Roadster, as they are "chalk and cheese".
Good Luck