I cant see playing anything other than Mizuno irons. Cant kick my MP 32's outa my bag either. My Wilson Staffs lasted for 25 years, so maybe its me.
Drivers on the other hand need to be replaced as oft as Titleist makes a new one, I find. Not sure if its metal fatigue or what. Those guys have me addicted to those things worse than the Starbucks monkey I have on my back. The drivers are way cheaper than the coffee over a year too if you crunch the numbers.....