For brutal cold (ie now until march)I've got a 5:3 XCEL O Zip, XCEL hooded thermal rashie, 3 finger mitts and Alder Plasma 7mm boots. A bit cumbersome, but I'm not really a high performance surfer and hate ending a session as I am too cold. Of all the above, i think the Alder boots are fantastic, and can't recommend them highly enough.