I currently play with 10 yr old Mizuno T-zoid graphite regular, however currently trialling a number of clubs as follows:
Callaway X-20, X-20 Tour & Fusion
TaylorMade r7
I did a 6-iron demo test on all 4 today - the results:
X-20 is a solid club, works pretty well and is reasonably long
X-20 Tour again solid, long, less forgiving (it is a tour club after all)
Fusion was a good, easy to hit club, bit tended to go a bit high for me (lost distance on ocassion)
r7 was the stand out for me. It was very solid, longer than the rest due to the slightly stronger lofts, but held its line well. It seems to me to be between a game-improvement and a tour iron, compared to x-20 & Fusion. This appeals to me, as I do not yet feel ready for a tour iron, yet feel that a game improvement iron won't force to me to work more on my fundamentals (ie. it hides the flaws).
Also, on a value for money basis, there is no contest - r7 wins that race.
Interested to hear any other r7 feedback as up to now I was going to get X-20, but am now swinging into the r7 camp in a big way.