The 710s AP2 are nice clubs and it's hard to make good performings clubs even better. I bought the 714s AP2 and can say that these are really nice clubs. I don't know if you will feel the improvements against the 710s. The best way is to test it...

Performance-wise you likely won't see much difference, aesthetically they're worlds apart, if that's important to you.  Right now I'm playing 712mb's, but I'm thinking about switching to the AP2's if I can somehow slip it past my household finance manager when the 716's come out.  (Then I still might go with the 714's...they look that good.)  

Jake,

If you love the 710's, then you'd really like the 714's. Even more forgiving, more consistent, easier to hit long irons, very workable short irons and much more. I recommend you setting up a fitting with an Authorized Titleist rep. Take your current 6 iron with you to compare to whatever the fitter puts you in. You won't be disappointed.

Jake,

I agree with David above. I would take your current irons and run the numbers vs the 714s. Each player is different and I had very little difference in the 2008 model vs the 714 model. However, I've seen a friend hit the 714s significantly better than his 710s. You'll feel much better knowing the facts like David and others have mentioned, whether you buy the new ones or not.

Jake, I've had the 710's, 712's and 714's.  Each generation gets better and better.  The 714's are not only longer, they are sweeter and have stunning visual lines.  Get the 714's.  The best line of irons put out so far.  Good luck!  Vern