I jumped on the Rosemary bandwagon awhile back and for the most part, find them to be good brushes. But they just don't do it for me like I thought they would. Being a typical artist, I've bounced around the brush catalog, looking for that magical brush that will bring my next masterpiece to life with a minimal amount of effort.
I tried the Robert Simmons Titaniums and liked them to begin with, until I ordered a handful of them and half of them showed up all warped and crooked. I don't order those anymore.
Then I found some synthetic brushes under the Dick Blick label and I have been gobsmacked ever since. These are some of the finest brushes I've come across and feel no need to continue my search. These are the Blick Master Synthetics with the red handles. And a month or so ago the Blick store here in Vegas announced it was closing and moving to a different location. They had a clearance sale going on and these brushes were being discounted by up to about 70%. I guess moving all those brushes a couple of miles west was going to be too expensive for them. I got a couple of large 14s and 16s that would run $35-40 apiece for less than $10 each. I ended up buying a bag full of brushes that day. And they are wonderful. Oh, and they have a lifetime warranty. Can't beat that with a stick.
Blick Master Synthetic brushes