Cant be arsed to writre much but I would get :
5mm Elios
open cell inner with black lining (easier to get in and still warm)
black nylon outer (go for camo if you want to feel like Rambo

)
high waist
A 2mm under-vest (sotto-muta I think in Italian) might be good for the shoulder months or if you do alot of aspetto - I get chilly in a 5mm om some days... must be metabolism / long aspettos with not much swimming etc - anyway I would think about it.
Ed