Jamie,
I've bought a pair of Nike snowboarding boots from the store at the designer village near you a while back. They cost me £25 and worked wonders! They were marked as B-grade (the box is stamped with a "B") but I couldn't see why they were as they looked fine to me! They retailed at around £150-£175 according the the Nike website.
Nike do some excellent outdoor kit in their ACG range which is as good as anything else you can buy. I've also got a snowboarding jacket which is full GoreTex and worked fine even in the really cold weather - I had to crack the ice off the jacket but I was still toasty underneath
Always worth a try as the store is so close to you.
Checkout my Yellow Submarine snowboard:
http://www.horrible.demon.co.uk/bareges2000/07.jpg