realskiers

I'm 5'10" and about 160 lbs.  In my experience, the RX is even more energetic than the MX78s.  It has an ash wood core versus the mixed ash and silver fur of the 78, and the base and top sheet metal layers are .8mm versus the .5mm of the 78.  The difference is evident in skiing the RXs -- 'kick-a-poo' juice that you mentioned is amped up, which I love!  The edge bite and grip on ice is awe inspiring.  We had one day here a couple of weeks ago that was 40 degrees at the resort, and the next day it was 11 degrees.  Some of the iciest stuff I've skied in UT.

It takes more energy and a bit more aggressive skiing to really bend up, load the RXs; though overall I actually have found it an easier ski to ski.  I've heard that it is less forgiving, and I can see how that could be the case especially if the skier has a tendency to let balance shift aft.

A demo day on the RXs is definitely worthwhile.  This year they're the RX12s, but the exact same ski can be had from previous model years and is called just the "RX."  Name was changed to RX12 this year as Kastle added the RX SL slalom ski.

I'd appreciate any additional recommendations on a UT based instructor, camp or other options for improvement.  I've looked at the PMTS camps, but as much as I like the videos and the book ... the info on the PMTS websites is a mess.  From what I can tell the camps sell out well in advance and are only held in Colorado.  I hear the skiing in Colorado sucks compared to UT.