S&S 124 can get you close to 150's without having to go B2 route and crazy compression or a happy dyno. Jims 131 can get you there with the right headwork, cam and compression. G^2 126 which is an S&S motor can also get you there at bookoo bucks, compression. I have 2 of the 3 I mentioned and both over 150 with Sach's touch. I just wouldn't expect under mid 11.x to 1 compression which on a bagger can be a bit daunting on the reliability side. Mine are all capable daily drivers, with the expectation that they can break, but that is a representation of the quality heads/work I got from Sachs that I don't and didn't need over the top compression to make the numbers. Don't believe Jims or Ultima have the Granite colors, but you could redo your heads and turn your existing 110 cases it into a 124 and keep the "sleeper" look. Or buy the S&S granite, reroute the oil,mill out the logo to make it look like fins on the head.
Thus far I am not a fan of the new S&S cases in the stock form and the way the oil has to pass. If you were to do the custom work to have the oil pass internally then I would say you have something, but when you do it they say you no longer have the S&S warranty on the motor. always a catch 22.