There are LOTS of great all-mountainboards out there. I think that some of the best value for money boards right now are:
YES The Basic
Capita Defenders of Awesome
Gnu Carbon Credit
K2 Happy Hour
These are all just my opinion, and if you decide to stick with with Never Summer, I have a buddy that loves his heritage as an all-mountain board.
I would imagine that anything in the 158-161 range would feel good after your raptor 159.
Good luck! I'm sure that you'll end up with something rad!