If you are getting 7k with a Xoar then using a Vess 23A your r's will go up probably by 2 or 300. I really can't see needing to go down to a 22A and putting it in the high 7ks.

Vess props are good for 3D but loud as heck for anything else. Using a 22A on the B 60 is just going to ripp that prop all day long. I use a Vess on my 3W-85 for 3D but for IMAC I have to swap it out.. the Xoar is loud enough, move to the Vess and it's twice as loud.