If you are into maintaining and cleaning your equipment, the AR will reward you with very good accuracy and almost unlimited versatility.

If you don't like cleaning rifles and can settle for hitting man sized targets, the AK will do just fine, nothing more, nothing less

IMHO, the AR is far superior to the AK in every way possible. Sure the AK will fire if its choked full of sand or mud, but can you honestly say that you will ever buy a rifle to leave out in the rain, bury it in mud, never clean it and your very life counts on whether or not it fires? Most rifles in America spend 99.99999% of their lives sitting in safes, closets, under beds, or behind the seat of a truck and are maybe fired 50-100 times per year if that. We don't live in a 3rd world country where rifles are thrown in the back of rice cart pulled by a Yak.