Need Golf Club Advice...

I am a 50- something returning to the game after more than a decade hiatus and am ready for a next set of clubs. I currently have a set of Tommy Armour 845's that are ok, but I'm looking to move up to a nice, pre-owned set of forgiving oversize irons. Need advice on what models would be worth looking at. I don't want to buy new right now, as I know that in a year, my game should improve enough to get that reward! Suggestions?