All of the above are good suggestions. I have a 60" 52@ 28" PSA, and I draw 28" also. You and I are shooting almost the exact same poundage. The only difference is I like 145gr. tips, because of my broadheads. I shoot Carbon Express Heritage 150's,2018's, and 65-70 spine cedars out of my Widow. All of them cut at 28 1/2". Like Brittman said: cut the aliminum and cedars at 29" and you should be good with 125gr. points. I'm thinking 29"-29 1/2" on the Carbons. But start long and cut them down until you get them right.
Bill