Hi Neil, nice idea, but what would you like them to debate? Maybe I'm cynical, but it seems to me that most of them - for some strange reason - reckon that their own kit is the, erm, cat's whiskers.
Quite a few industry people do use the site and certainly folk from Berghaus, MHW, TNF, Lowe and Crags have posted to the forum - I've been known to contact the big brands by e-mail where it's relevant btw, though not that often.
ArcTeryx, I really don't know about - it's got a good reputation but it's very expensive and as I've never used or tested it, I can't really add much to that, except that it's made in Canada. Interesting how brands pop up - there are always people who want an alternative, high cred cuttung-edge brand that's not common. It used to be North Face, then Mountain Hardwear with Patagonia always somewhere in the background and ArcTeryx are the latest on the list. Is anything worth that sort of price premium? I don't know.