I haven't done Irons yet because I don't have the PING G10 (Graphite) yardages. :(
I'll try to get that up as soon as I have the info. I've requested it from WGT, but they're quite busy this week leading up to the Open.
If I had to recommend one, it would probably be the steel PING G10's. Only because they are the longest irons available at the moment (the burner's have shorter and odd, non-rounded yardages like 173, 182 etc) and they don't sacrifice a ton of forgiveness.
And for what it's worth tibbets endorses the Tour Starters.
So that should get you started at least. :)