I bought my pack from Downworks. At the time, they sold WM bags (still do, it seems), so they would seem to know something about quality bags. I like the designs. I think people have different needs re: sizes and shapes. Prices look reasonable. I might try to steer one of my friends there. He's carrying twice the bag he needs because he insists he can't sleep in a mummy-shaped bag.
My experience was very positive there. I think they have a good reputation.