hello big worm! dont know if its any help but i was in your boat six months ago,and in the end i bought a package deal of bed char and bivvy from fishtec or as its sometimes called (the matt hayes retirement fund)but i was a bit dubious about the quality.The bivvy was the tf gear x shell pram hood style,and i have to say that for the money which was £97 delivered to my door with a bed chair aswell,its bloody brilliant mate it kept me well protected for the last 2 nights plenty of room too, just keep dry and invest as much in a good bag and cover as you can afford !one more thing ,haggle on the phone when you order the salesmen have plenty of room on price to play with ,good luck in your overnight adventures mate!