I am am athletic. early 50's guy that skis the course about 5 days/wk; 158 lbs/5'9". Now skiing on a 2005 Monza.  Looking to do a "ride& buy", and trying to narrow my choices down to one or two skis (unfortunately there are no ski shops in our area with the skis I want to try).   I actually skied my PB this year---5 or 6 full passes at 28/34.  Looking for a new ski that will allow me to advance, while it works with me to overcome some of my technical flaws.  The Monza is somewhat erratic and occasionally stalls on the off-side.  I like it's speed, but-----.  Of the skis I have read about (or discussed with others) the Z7 and Strada might come closest to matching some of the characteristics of the Monza (i.e. shorter turning radius, likes speed into the turn, etc.).  However, my daughter has been skiing on an X5 for five years, and I see some advantages in moving to a "symmetrical" turning ski (like the new X7) that might be more stable/consistent (but, with less cross-course speed)---and, I can handle the additional "effort" of this type ski.   The Z7 and Strada appear to lean more towards a "technical" skier (where I'm "challenged"), while I'm guessing that a ski like the X7 might net many of the characteristics I really need to advance "technically".  I tend to ride a ski maybe 60/40, with a little more pressure on the back (and the Z7 appears best in that category).  Again, I'm looking for a ski that will help me advance, not one that necessarily has a similar personality to my existing ski.  I am willing to forego a couple weeks of "re-learning" (X7, for example) if it could ultimately help me long-term.    Please give me thoughts on these skis or others you might view as a "good fits".  Also, I'm a "tweener" as far as size, and would be interested in your "take" on 65" vs 66".
Thanks, Steve