I've been on the hunt for a ski that's 85-90 mm underfoot, 175-178 cm length, and as close (or less) than 6 lbs. per pair. My searching yielded three results: Black Diamond Revert, G3 ZenOxide 88, and La Sportiva GT.
I never tried the ZenOxide. I'm not a fan of G3's stuff (bindings and skins anyway) and I'm turned off by their 60-day warranty.
I skied the Revert 20+ days in a lot of conditions. In perfect conditions they skied ... average; in less-than-optimal conditions I really, really, really did not like them. Also: The top sheet was already peeling off ... bad.
I traded the Revert for the Sportiva GT. I've put five days on the GT and skied steep ice, sloppy, wet pow, heavy pow, and minimal crust on sloppy corn. After only five days I'm really glad I made the change.
My biggest complaint about the Revert was that they had no pop; they were like limp noodles on my feet. To compare, the GT feels stiff and snappy on my feet. Awesome. I haven't skied really bad crud yet, but in minimal crud these things handled really, really well. Way, way better than the Revert anyway. The GTs (probably due to the lack of rocker) feel a little sluggish going up and the lack of any rocker is a bit of a bummer, but not a deal-breaker. (The Revert flew on the uphill.) Also, due to the lack of rocker these ski (I ski the 177) really long; I definitely wish these were a 175 or even a little shorter (I'm 6'0).
Overall, after a few days on these skis, I'm pretty damn happy with them, especially compared to the BD Revert.