I've been stalking the fitting availabilities for the last several months, and there's a Titleist fitting at my home course in two weeks! A quick check with the funcrusher/boss revealed that, yes, I do have time to go and see what could be. I'm currently gaming TM P770's (not fitted, picked them up last year), and hitting them fine, but during a my last lesson my pro gave me some crap for not being in the correct shafts (R vs S).
I am not really in the position to buy new irons, as I was fitted and replaced my D (TSR3), 3W (TSR3), and picked up a U505 at the beginning of this year, but I am really curious to see what the implications of properly fit irons will be related to distance and dispersion compared to my current set up. The way I look at it, I'll have the specs on file to be able to go after when I have some extra cash on hand.
Has anyone else ever gone this route - getting fit and then purchasing at a later date? Did it work out? Did you wait too long and then find out that those specs were no longer applicable? Am I setting myself up for failure?