Hi Sailing Tom,
My advice would be to go to a dealer and try his demo cars, 4/4 and +4 (even the roadster for fun).
If I was buying again I would go for a 2.0 Duratec (pre 2014) as that car has a brilliant engine.
The 4/4 sigma (as late as you can afford) is also a brilliant car.
As people have already mentioned, when you drive it you will know!!
Good luck and keep us posted on your test drives and final decision,
Enjoy,
Ian