the Mizuno is the only one that is not a composite and is still using aluminum which worries me. I have owned the Demarini's and Mizuno's in the past and they dent really easy and your lucky to get a year out of them. Also i play in 3 leagues in the summer and 2 in the fall so you are looking at 100 games a year.
The other 3 bats have all recently been banned by NSA so I am worried ASA might be next but more so they are a lot more money. How durable are they? Can I get more then a season out of them?