David (GREAT name by the way!),

It all depends on each player...on YOUR game. Some people prefer to use the same shaft throughout their irons and wedges. Some people prefer a softer shaft for their wedges because it could allow them to gain a higher launch and more spin, say, with a lob wedge. I've mentioned something like this in a similar thread, but...I've fitted a guy once who had DG X-100 shafts in his irons, S-400 shafts in his 52* and 56*, but, had an R-200 in his 60*. Wedge fitting is very important. See if you can find an authorized Titleist fitter near you and give them a call. They'll fit you properly for your short game. 

i currently have tm tour preferred irons with project x 6.0 shaft with a 1 degree up lie angle and just recently i ordered the new sm4 wedges at 52, 56, 60 and had them bent at 1 degree strong so the gaps are no more than 4 degrees apart and got the project x 6.0 on those with 1 degree up on the lie... didnt get them fitted like i did my driver and fairway metals. i have played 1 round so far with them and like them. after reading some posts im starting to wonder if i did wrong by having them bent strong and or the shaft selection.. thoughts?