Hi, Jon. Thanks for your reply. Favorite size is G3, standard size for Simpsons, although I've seen G2 and I have a G1 in the photo. G1 is pure bristle. Not for the faint of heart, but I like it! It has some scrub/scritch and can really power through hard soaps which I prefer. You can find other than pure bristle on the Simpsons website. I've had pure (G1 faux ivory Simpson in photo), best (pif'd), super (pif'd), 2 band silvertip (jade Simpson in photo), and Manchurian (ebony and faux Simpsons in photo). The 3 Rudy Veys are Shavemac 2 band silvertip (butterscotch & lime) and faux ivory in Shavemac d01 2 band silvertip in photo. Currently I favor either of the Manchurians or the d01 because (again) of their ability to power through hard soaps. Manchurians and d01 are very dense, robust, scrubby knots. These are what I like now. Recently, I have also developed a fondness for boar bristle. Earlier in my shave journey, I preferred soft, gentle, luxurious knots like a Shavemac 2 band silvertip, not (see what I did there?
) d01! But, we do change as time moves forward. Rudy Vey describes the d01 2 band as an acquired taste. BTW, yesterday I ordered another Shavemac brush w/ d01 2 band silvertip knot.
In everything stated above, as in most things in life, YMMV. Let me know if you have questions or if I've not been clear. Enjoy the quest!