Inb4 "inb4 mountainviper" haha
Yeah dude I've told this a bunch of times now. I got the opus early so I have a better idea of how it handles compared to someone who demoed it for an hour. First, I'm 6'1" and 185-190 lbs. Second I'll tell ya like I tell everyone else concerned with length, the opus has more running surface and more effective edge than most other pow skis. As far as pow skis go I have never felt like they were too short for me. Even on groomers they feel like they're the perfect length for me. Plenty of stability but not so long ya have to fight em. Now that said and looking at what you want to use them for, I'd almost say go bacons. Unless you want a really wide ski, which is what I prefer. The bacons will be much more nimble on the hardpack for sure but I gotta say I was blown away by the opus on hardpack. It actually handles groomers even better than last years bacons and has that "go anywhere do anything" feel. I actually think that for me, if they were say a 190, I wouldn't like them. It's important to tell ya that back in the day when I was competing on moguls I rode a 190 dynastar and for all mountain/backcountry I rode a 205 atomic. So I'm no stranger to long skis. Back then I wasn't doing the kind of things I'm doing now though and there is no way I'd go over 185 at this point. Ive owned alot of skis over the years and have more than a few pairs hangin out in the basement. The opus is still the longest I currently own. I really think the big push for length as of late is a little unfounded in a lot of respects. IMO if you can't land something on a 172 that you can on a 191, you have zero business attempting said feature. Here is what I would suggest, if you can at your local shop, lay one down and put your boot on it as close to mounting position as possible. (with your foot in the boot of course and eyeball the midsole line with the boots midsole line best ya can.)  You should be able to get at least some idea of whether or not it appears long enough for ya.