I am within 24-48 hour of buying a new set of irons. At my age, physical condition and playing in this ridiculous Miami heat and humidity, I need something with the lightest possible head so lengthening it an inch will leave me able to swing it without exhaustion. I'm looking at XXIO Prime irons and Cobra Air-X. While it may cost more, I think I'd prefer the XXIO.
Details to follow...
[EDIT]
I found my XXIO Prime irons, 5-SW, Regular flex, 1/4" extra long, (which I'll extend another 1/2" since I already have the extensions cut to that length)...
I have been assured the heads are about the lightest XXIO ever made, so my extensions, counter balanced with my usual 75 gram 1/8" oversize grips, should still be in the C5-C8 range.
They should arrive Tuesday. More then...
Wish Mizuno made something with such light heads...
[EDIT]
Contrary to advice from 2 different club companies, the XXIO irons arrived and were very head heavy. They are sitting by the front door for Fedex to return them. Considering the news in a thread I just posted in the Equipment Forum, I'm really sort of happy about it.