Don’t listen to the Emperor Flashy. Boarding is the one true way. 😀
I’d hold off buying too much till you’ve had your taster days. I know a few people (women particularly I’m afraid) who have an attic full of decent snow gear after they gave up learning.
(the basics really aren’t that hard to learn – but it will involve a fair bit of falling over to start with and some people just don’t like bruises).
Board, bindings and bag are probably the last thing on the list you want to buy. Easy to rent a board+bindings in resort and the cost is offset by not paying for ski carriage on the flights.
After the basics of jackets, goggles, gloves + a helmet (if you want) then your own boots are the most important thing I think – in terms of overall comfort.
No real idea about prices these days but Absolute Snow is a good place to shop: http://www.absolute-snow.co.uk/
And if you are buying a lot of kit new from shops then it is worth (one of you) joining Snowboard Club UK which gives discounts at most shops and 10% off at Chill Factore. membership is £15 but it will pay for itself several times over if you are buying gear or riding in fridges a lot.
http://www.snowboardclub.co.uk/