I sort of agree with mgranato, but there's a lot of possible issues with graphite in irons and if you pay to get those resolved, it usually means you have to pay extra money.
Typically graphite shafts are longer because the shaft is lighter ans they are trying to add weight to the club. But with longer shafts you're likely to hit the ball higher and perhaps too high (Personally I feel those who can control traj. the best usually wind up being the best iron players). Also, the effective lie angle becomes more upright, something I'm not a fan of because I think it gets a golfer to have VSP too steep in the end.
There are ways around that. You could add more weight into the clubhead so the shaft doesn't have to be so long. Although that will greatly increase the swingweight and to even it out you would have to add weight up by the grip end.
Power has its place in irons, but accuracy, consistency and distance control should come first. I'm not completely anti-graphite, but that's what I would consider before doing it and I think it costs a lot of money to experiment with that to get the right club. Plus, how many major championship winners have won with graphite in their iron shafts?
YR