Considered it when I did my research over the last month. One thing was clear they are a narrow compact unit which would drive me nuts.
I just ordered a Western Mountaineering Megalite with an extra shot of down. Their reviews are pretty much 5 star across the board. Was $777nzd landed from Hermits Hut and the extra shot of down was a free offer. This will make the bag 736grms and comfort to -4. Over time down bags loose some integrity so a bit of headroom should be considered. This bag has a tone of room which I like.
Western Mountaineering have a good honest website with useful info. I have read hundreds of reviews and landed on this bag.
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