The Nikon Pro Staffs are decent. I'd get one over a Barska, but I still wouldn't buy one. You can get a lot better scope in a Burris Fullfield II or Vortex Diamondback for not much more. Do you not like Burris or Vortex?

You should read the optics talk review thread. They talk about a Barska and a Prostaff compared with the Burris and Vortex.