I have thoroughly enjoyed many of my Simpson brushes and currently own a Chubby 1 in super, a Duke 3 in best, a Classic 2 in best, a Wee-Scot (in best), a Classic 1 synthetic, and my newest a Major in super. I briefly owned a Case in best.
While the Wee-Scot is great for what it is, I wanted a little larger, less scritchy brush for travel. My first attempt at a new travel brush was the Case in best. I liked the size of the brush and was happy with how it lathered, however it felt too scritchy for me. It seems that the badger hair in best for the both the Classic 2 and Duke 3 is of a higher grade than that of the Wee-Scot and the Case.
My next attempt was to try the Classic 1 synthetic. The Classic 1 synthetic is a good travel size for me, bristles are extremely soft (maybe too soft) with good backbone and drys quickly. But this brush was also not for me. It forced me to smash the brush against my face as it would not splay at all. Two replacement travel brushes now and neither was right for me. I should have bought the Major in super to begin with.
I received the Major yesterday and used it today. It is exactly what I was looking for. The knot has begun to bloom nicely after the first use. This brush has good backbone and good face feel for me. I believe it will also dry quickly, however I cannot yet verify that as I did not stay home to see if how quickly it would dry. The actual brush, its style and its handle (travel case) all scream out "high quality precision brush". I should have bought this brush in the first place and would have both saved money and time since I ended up with it anyway.
Like razors, blades and soaps, brushes are highly personal in what is desired, but for me I have found my ideal travel brush. YMMV.