Let me start by saying that I don't own any CAI assembled AK's (unless you count my Golani).
However, I was in your position a while back and was asking similar questions. I think the main concerns here are the possibility of getting a rifle with "canted" (misaligned) components, and also to the true AK fans- the use of the non-chrome lined US made barrel in general. Unless you plan to shoot the hell out of it, or shoot corrosive ammo, that won't necessarily be a huge issue. I haven't noticed any reports of "keyholing" 1960s. Basically, if you don't mind taking the risk that you MIGHT have to deal with making an exchange/return, then go for it. The only other thing I can think to tell you is to Google "Century Polish 1960 receiver problems" and make sure there are no reports of any issues there- that is what they ran into with the Golani rifles. That being said, mine runs fine (for the time being, knock on wood).
If you aren't set on the milled rifle, you might also scroll a bit further down and check out the Interarms produced AKs. I have heard good things.
Good luck! I'm sure some folks with firsthand experience will chime in when they see your post.
-acarp