I just know before I post this that you all probably know already, but you may not!
Here in the UK there does notlook to be much in the way of ready outlets for GW related items (unlike the USA). After spending quite some time trying to find a pair of reasonably priced headsets for my partner and me, I came across these on this site: http://www.talkingheadsets.co.uk/motorcycle_accessories.php
I ordered a pair and fitted them this weekend and the work great. Admittedly I have nothing to compare them too having limited GW experience, but we can hold a conversation at 80 mph me in an open face, her in a flip front. Just thought someone may like to know that you can buy two sets for the price of one from some other outlets.