I've still got my K2 Fours if anyone's interested!
Seriously, as John said, I'm pretty much down to a one ski quiver: the SS Speeds. They're versatile enough for any conditions an Eastern skier is likely to encounter. At camp last year (A Basin) we got 5-10" of new snow every day and they had no problems. (My technique? That's another matter.) More importantly, they respond quickly and reliably to PMTS movements, so they reinforce learning. Oh... they're also a joy to ski.
I just put my only other skis on consignment at a local shop (Atomic Blackeye Ti, a midfat all mountain ski). They respond to PMTS movements up to a point, but, they have a stiff mid-section and excessive tail rocker. This makes it impossible to finish a turn and release when YOU want to. The stance ski tail just lets go into a skid. Unless you're making only snappy, fall line turns, that tail rocker injects some rotation into every turn. Not good for PMTS skiing.
The SS Speeds are softer flexing, but the flex PATTERN is even from tip to tail. They hold until YOU release them, without skidding. If I run into 18" of PNW, I'll just levitate!