I've considering a Snugpak UQ for a while now, still can't make up my mind whether to just pay the extra and get a UKH one.
One question about the UKH down ones; Do they leak feathers? All the down sleeping bags I've had experience with seem to shed feathers pretty quickly...
I've had very few feathers escape with my UKH quilts Kit, the fabric Matt used on mine has done a really good job. Usually you get a few coming out when they're new but I can count the ones I've lost on one hand.