The PM2 is a great scope worth the extra over an over priced NXS.

Incidently the FT 50 mag is still in prototype stages but near to finalisation then production.
In answer to this "What would the S&B do that the Burris/Leupold/Nightforce" Considering the first two are not available unless second hand, that only leaves the BR & NXS of which the S&B FT scope will be approx £95 cheaper!