Obviously I am biased, but if you think there is a chance a 176cm would work for you, we have some 14/15 176cm Wren 102 on sale right now for around $420 shipped.
Size wise, our 176cm is going to be just a touch shorter than a 180cm BD, so something to take into account. Our 181cm will be around 3cm longer than the 180cm BD.
At your size, I would say the 181cm would probably be the best fit, but in CO with lighter snow and more hardpack compared to say, the PNW, I don't see too many times where you would lose out on the slightly shorter size.
It is still a stout ski in a 176cm, but a bit easier to throw around in trees and in bumps, plus a bit lighter and easier to kick turn, so depending on where you ski, it could be advantageous. If you are skiing primarily open terrain - say Loveland Pass, Snowmass, Vail back bowls, then I would say you are probably good on the longer size. But if you are in the trees a lot, ski any areas that get a lot of bumps, and want a bit less weight for touring, 176cm might be the way to go.
For what it is worth, just for some ski perspective, my everyday, one-pair do it all ski for the PNW would be a 186cm JF 114. If I was back home in CO (I grew up in Boulder and skied the front range since I was 3) I would rock a 181cm Kartel 106. So, just some perspective on how I feel about ski sizing.
If you do end up picking a pair up, and decide they are too short, let me know and we'll get you taken care of. Let me know if you have any other questions. Thanks!