Here are the lofts for your set:
4i - 23*
5i - 26*
6i - 29*
7i - 33*
8i - 37*
9i - 41*
10i - 45*
W - 50*
Because your set has strengthened lofts, there would have been a massive gap between your 9i and W. Callaway introduced a 10i to fill the hole.
If you buy clubs, dont buy one with the same lofts as these listed above. Oh and the Vokey spin milled wedges spin the ball like none other. If you spin the ball well anyway, you probably don't need one.