If you live in FL, maybe you should consider an AP, as it would automatically get you the hopper option and free parking. If you are planning on returning within 12 months of this trip, AP's are definitely worth it. I would recommend getting a Disney Visa card and charging the AP, as I believe (although I am not 100% positive) that you get 6 months interest-free to pay off your Disney tickets. As an added bonus, AP holders get all sorts of discounts on food, merchandise and rooms. Last time we were at WDW in February, Disney had a 20% discount for all of its AP holders at most of its stores, even the ones in the parks.
As for your original question, it depends on your sons' preferences, but I can tell you that my son who just turned 8, loves AK. Have a great trip!