Hi Rob,
I have the sealskinz and I have
to say they are rubbish. Firstly they do not keep the cold out, wore them last year on a commute and my hands got so cold I felt physically sick.
Secondly they keep the moisture in and do a good job of promoting smelly finger rot.
Thirdly the fingers are so tight you will need to be a piano player to wear them.
there seems to be a lot of waterproof gloves on the market now. I would shop around if thats what you are after and get something breathable.
Specialized sub zero look good
http://www.primera-bournemouth.co.uk/Te ... rodID=4556