Richard, I think the Svalbard looks a great tent. My recommendation of the Hexpeak was never intended to suggest an alternative to your choice, it was purely aimed at Gunwharfman who said he was looking for a lighter more spacious alternative to his Marmot Pulsar, which I think it is. The Svalbard looks a very good price and weight for a robust four season tent with a compact footprint.
Having said that, and with no connection to Luxe other than being a happy customer, I do think the Hexpeak range are very good tents. The weight doesn't include poles because they're commonly pitched with walking poles, which most people are carrying anyway. The shape gives unrivalled interior space for the weight, and sheds wind very readily. There's a range of sizes and interior configurations available. The winter model is, I think, a distraction - the snow skirts etc are inevitably going to increase warmth at the cost of ventilation. As a result its a tent designed for very cold, dry winter conditions - I'd imagine the type more often encountered in Scandinavia or the States than here. Certainly I'd think that pitching a tent like that in drizzly UK conditions and bringing wet gear inside is asking for condensation issues. I wouldn't buy one of these winter models for use in a UK winter, in general, but that shouldn't detract from the merits of the rest of the range.