Sounds good except the S55 lofts are the same as the i20/25's. No problem ordering the 9 iron with a weaker loft. You can always make the wedge a little stronger as well. I really like the 55's, actually think I hit them slightly better than the i25's.
BTW you can customize the swing weight (you were talking about D0) in PING irons, that's what the weight port in the cavity is for. I go D3.
Yeah I need height anyway so I think the S55s are lower launching which may not help me...? I want to try them though.
I did that with the i20s and customizing the weight in the port as well. The S300 shafts made them a heavier, but had them put lighter inserts in the ports to keep them at D0. I may go to to D1 with the next set. Not sure when that will be but I will try the latest "s" and "i" series out.
My hybrid and 4w are D1 which I really like. The driver I have no idea. The Driveway is a D4 which feels heavy to me but I swing it fine.