Ride has the Yukon (it's a wide version of the Concept TMS apparently) that's supposed to be a pretty good board for groomers and it'll hold up if you go into the backcountry. It should also be in a 168 size if you want to go that high.
Might be a tad bit expensive, but if you have help and you can find it somewhere a bit cheaper it's worth looking at.
They also have a board called "Slackcountry", but it'd be more for if you wanted to do mainly powder, and it sounds like you'll be doing mainly groomers rather than powder.
Also, I don't know about your weight and what not, but I'm 6' 190lb and I go up to a 164cm on my boards.