In reply to olliehales:
i'm an owner of both...
quasar first, then - after a decade - replaced with a Kangri. i will start by saying that i took the Quasar to places i won't take the Kangri, but thats because when i had the Quasar i was young, adventurous and not a bit stupid, whereas now i'm married, have three kids and think that discomfort is for the witless.
that said, i've used the Kangri pretty much everywhere in the UK in all seasons, and in the Falklands in Winter. for me the Alpkit materials and build quality match the Quasar, and the design of the Kangri is better than the Quasar for those long winter nights while trying to read, eat, cook or get changed - i also think its more horizontal rainproof.
the other issue is the after sales service - with my Quasar, at perhaps 8 years old, a pole snapped on a warm spring day in an utterly still Langdale (TN had a long running problem with poles snapping - it was moaned about on here endlessly - no idea if they've solved it..), and when i rang up TN had no interest apart from whatever outraguous sum they wanted for a new pole. Alpkit, and i hasten to say i've never had a problem with the Kangri, have a markedly better reputation...
if mine got knicked i'd buy another, probably witout looking at what else was on offer. if they didn't exist i'd probably look at half a dozen tents before considering another Quasar.