I will add my observations on the Big Trouble. I bought some 186's last fall, but just put in my second day on 'em at Copper Mtn. yesterday on a nice (not epic, but nice) powder day.
These work very nice on typical Colorado resort steeps: soft chopped snow, moderate bumps. I didn't like them in harder, more rutted bumps, but then.... I don't enjoy skiing terrrain like that regardless. The longish turning radius of the ski works well in the softer snow conditions where you don't need to be able to make ultra quick changes of direction. I found them very consistent and predictable which becomes confidence inspiring.
I mounted mine back near the "standard" line, and I did not experience the tip diving that some posters have mentioned. I was not consistently in deep snow, but I specifically sought out some deep untracked in the bowls. I could see how, if I let my weight get too far forward, I might have induced tip dive, but having spent most of my life on skinnier skis, I found these to work great.
On groomers with occasional "colorado icy" spots, I found them passable, though they're certainly no ice carver. When I would edge it hard to scrub speed quickly, the tips and tails would flex hard, then release repeatedly. It was not an unnerving thing, just the reality of a ski relatively stiffer under foot than in the tip and tail.
If I was the type who spent more time on groomers (to me they're only transportation to more fun terrain), I'd probably opt for something with a shorter turning radius. In chopped up powder, bumps, steeps, I found them to be quite competent - which is what I was hoping for.
Some have called them heavy? I can't say that I noticed that in any way. I didn't notice any excessive swing weight when needing to whip them around quickly on the steeps.
I really like the fact that I have never had the tails hang up on me. Perhaps it's a flaw in my technique, but some skis will occasionally scare the cr@p out of me when the tail won't release for me to whip the skis around quickly. So far, the BT's have been excellent in consistently releasing. That said, with these being my first twins, I seem to cross my tails when I'm just stopped/in lift lines/etc. I finally fell yesterday while resting part way down a steep bump run (must get in better shape!) from accidentally crossing my tails slightly.
I'm a pretty big guy (6'2", 215), and I found these to be beefy enough - perhaps a significantly lighter, or less aggressive skier might not enjoy them quite as much.
Overall, I think I've got another Dynastar winner.