Going to bump this based on my new club purchase. For background I'm ~ a 7 handicap.
First, this was my first trackman club fitting. I've been super impressed with the entire process. I spent over two hours at my local shop and it was just great. I had all intentions of getting Titleist AP2. However, ended up with Mizuno JPX 850-forged. Really hit them the best. 1/2" long, X stiff KBS C taper lite shaft, one time soft step. Played them for the first time last night for a few holes and really hit the ball solidly. I've always played standard length club (I'm 6'2") and I think the extra length has really helped. If you have the time and inclination I'd recommend a trackman club fitting. At my local shop they do it for free if you end up buying irons. Turns out they were the same price there as they are at golfsmith etc.