In reply to mcawle:
Well a new ME Lunar 1 (https://www.mountain-equipment.co.uk/products/lunar-i) is either 5g or 90g lighter than a Softie 3, depending on which stats I'm reading, and is also £50 cheaper. However I think there are more second-hand Snugpaks for over £40 on eBay.co.uk than second-hand MEs, showing they are fine at retaining some of their value. Also there are far more new Snugpaks listed for over £200 than MEs. So Snugpak has a larger presence in the most upmarket niche than Mountain Equipment does in the UK. (Snugpak also has a considerable presence on foreign second-hand markets from what I have seen, eg in Bulgaria). This success must be partly a product of their expertise and high-quality manufacturing know-how. Snugpaks certainly have a reputation for being bombproof (ie very durable), maybe that's part of the reason.
But from what I am seeing there are more new and second-hand bargains to be had from Snugpak on eBay, maybe just as a function of the number of sellers in the UK (ie you may be more likely to find a bargain among 50 Snugpaks than 10 MEs on sale on ebay at any given time). For example the (older model, but condition new) Snugpak Softie Technik 1 which I found is only 60% of the price of the ME Lunar 1 (although it does weigh 110g more).
I believe the stats for the oex200 are not reliable. I think it should have a comfort rating of 13C or more.
Synthetic because I am on a very long walk through the Balkans and Turkey, making it more likely that at some point I won't be able to dry the sleeping bag properly (say if there is no laundrette for a stretch of the route, I am only in guesthouses for three 12-hour periods every week, the weather is wet for weeks on end, and every time I use the sleeping bag it gets a little bit more damp due to condensation. I also like to wear the sleeping bag on my chest, outside the rucksack, to distribute the center of the weight I am carrying further forward.)
Post edited at 14:07