In reply to london_huddy:
Yes, I'd looked at alpkit (probably before anybody else, to be honest - love the company). But there are a few inklings in there about stretch on the flysheet, and also some of the fixings. At six hundred quid I think you're right about the value, but it's a tad heavy. I looked at the Zhota as a tight 4-person, but was wondering if there was anything else before taking the plunge.
Thanks for the reply.