Re: AP1 vs AP2I hit both the 710 AP1 and AP2, I ended up buying the AP1s. The AP2 felt great as well but clearly not as forgiving as the AP1.
Even though the AP1s are cast iron, I really like the feel and didn't think the AP2s felt that much better.
I'm not skilled enough yet to appreciate the better workability of the AP2s, but when I hit a nice shot with the AP1s it goes exactly where I want it to, and at my level this gives me confidence. The not so perfect shots still go very straight but don't go as far.
I agree with Dub, the AP1s are mid-level irons that happen to be quite user friendly: they reward you when you hit great, they'll let you know very clearly when you mishit, but won't punish you too badly.