That is exactly where I stand as well having the MX 23's and ready for the JPX 825 Pros's!!!!  Really interested in how they will differ...the Mizuno rep stated that I would really notice the difference of the square groves, playability & distance of the 825's ?  They also seemed exceptionally lighter than my MX 23's with Dynalite R300 shafts which would take some getting use to I would imagine?   Any thoughts appreciated,     ScatCat