You won't go far wrong with a Sundridge. Main advice is to get a two piece, they are very warm and if you have a bit of a yomp to your mark or if it is not as cold as you thought it is handy to be able to take the jacket on and off.[/QUOT
2nd the above.
I have had different Sundridge suits over the years. My most recent is the Crossflow type. Bit dear now, but you can get the mk 7 cheaper.
Best thing I find is the hand warming pockets on the sides of your chest-keep my hands warm as toast even in Norway.
Mick.