Who's telling you the Era isn't stiff enough for 60% park? Angrysnowboarder.com has a review of it , read that. And if you're worried about the Era not being stiff enough the Attack isn't going to be either. They're pretty similar.
Did you take a look at any of my other recommendations?
At this point I'm inclined to think you aren't actually asking for opinions because you've already decided on the Attack and you are just asking for our approval.