i have the current AP1s and personally prefer the 'old' models. the new ones look like titleist have just tried too hard in making their irons different from last years ones and therefore just dont look as good.
Thing is with Titleist, in the main they bring out replacements every 2 years. That isn't bad compared to some.
To me, the AP1's are too busy and clunky, the AP2's are nice but not significantly different, and the CBs and MBs are nice, but not nice enough to trade in my ZBs.
There should be some good deals on Vokeys coming up soon, as shops will have to move on old stock before the Jan groove change.