I like a 131 type brush. I don't have the 131, but I do have the aromaleigh.com's version of the brush which is made with the same silk fibers. As a matter-fact, this was the prototype for the 131, & I'm fairly certain that the brush company that distributes these brushes to aromaleigh also makes Enkore's brushes, but he switched over from silk fiber to synthetic bristles (like the Sigma SS168) & I don't like the application a synthetic gives. Aromaleigh periodically runs 20 or 25%-off on these brushes so I have 2 that cost me a little more than 1/2 of what the 131 retails for & shipping was only $3.xx. Naturally, I prefer the handle on the 131 rather than just a generic brush handle like Enkore's & aromaleigh's, but the brushes do a wonderful job & since I owned them prior to the release of the 131 I couldn't justify spending $40. I also love this 131 style for contouring under the cheekbones & applying highlighter on the upper cheekbones. It's also great for a light application of bronzer.
I also have coastalscents black-handled stippling brush ($7.99, I think) & MAC's 187. Naturally, MAC's is made much nicer than coastalscents, but you can't beat the CS price. I haven't had any shedding issues with the coastalscents brush.
HTH!