Matt,

   You don't say what club you are hitting so I will assume it is a 6 iron.  First of all hitting practice balls from a mat indoors is not any way to make decisions. None of that is real golf -- hitting from grass outdoors,  using a real  golf ball ( Pro V…) is the only way to do this

  so it is hard to say about your numbers, but these numbers are typical of what you might see indoors off of mats using a practice ball -- vey low spin for those speeds. You cannot trust the numbers in these indoor hitting situations.

steve ball
PGA Master Professional 

this was with a 6 iron.. i went back today with a PRO V1 and my  ball speed jumped to 120 and spin jumped to about 5900-6000 rpm.. 

Matt - I just got fit for new irons last week, at Westfields Fitting Studio (Clifton, VA) (off a mat, premium balls, trackman, onto the driving range).  My numbers are similar to yours (6 iron average swing speed 81 mph, handicap index 12.5).  I hit both the 714 AP1s and AP2s, and many of the same shafts you hit (KBS Tour, XP95 stiff, steel fiber i95 stiff, NSPro 970).  I ended up ordering AP1s with steel fiber i95 regular flex shafts.  For me it came down to the XP95 stiff and i95 regular (which on the frequency machine turns out to actually be stiffer than the XP95 stiff flex).  Both were great, and my numbers and ball flight were almost identical with these two shafts -- I just liked the feel of the steel fiber i95s, and their uniqueness a little better.  Also for me, both the AP1s and AP2s were great on center of the club face contact, and I love the AP2 looks, but for slightly off center contact the  AP1s were quite a bit more forgiving.  If you have a chance, you may want to try the i95 shafts.  I can't wait for my new irons to arrive!

Elmer