First of all. Welcome to the site. As for the irons, I don't think you will see much difference in terms of distance with any of those sets, unless the loft of one set is lower than your current set. Main thing to do is to get a set with the RIGHT shaft for YOU. I'd also recommend you check out the Acer XK irons from Hireko Golf. Excellent set of irons, and with the right shaft, they should be a nice set for you. I've get a set of ther XK Pro irons with Dynamic Gold R flex shafts, and they are excellent clubs.
Best advice I can give it to DEMO each set and see what YOU like the best.
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Putting is easy, IF you have the right putter.
Later, Don.