Thanks for the input, chaps. Prathmann, yes it's for solo. I do have another tent, which is only 1.5 kg, really easy to put up, beautifully small, but the trouble is, I have certain issues with it. For one, it's side opening, which I really don't like, and there's precious little porch, but mainly, after I've zipped it up and I lay there staring at the inner about a foot away from my face, I can't help thinking this must be what it's like to be six feet under. There isn't any joy to it. I tried the Vango tempest instore and it felt like I had space to live, rather than space to exist.
I think a lot of the weight is die to its sturdyness. it's something like 3000 head, so bombproof, and I do like the idea of having a tent that can cope with anything. I've had tents in the past where I've woken up with the sides slapping me in the face when the wind's picked up, or where when the heavens have opened and I've woken up with creeping damp from the feet end of my sleeping bag. I may never tour in any real extremes, but I live in the UK, which while a pretty moderate climate on the whole, can really pull some bad weather out of the bag at the drop of a hat, and I do like the idea of a tent which keeps me dry and won't have me out in all weathers lashing down flysheets.