IMHO, there are two big differences between a regular iron fitting and a wedge fitting. As JB mentioned, bounce is a key issue. I also am curious about Pro's choice of wedges, but given the state of my bunker play last year under pressure, I am about the last person to question anyone. The other aspect is that distance gapping is closely addressed. You should have a good quality launch monitor and use your ball for the fitting. I would take any David Leadpoison (aka Ledbetter) advice with a large grain of salt, but I agree he is probably correct here. Finally, some food for thought. Have you considered some short game/wedge instruction prior to investing in new equipment? The reason I mention that is that I had a very subtle decline in my wedge play for a lot of last year, culminating with a virtual collapse. I had developed a swing problem that carrying five wedges would not have solved. You may want to run that by Andy before taking the plunge.