My 2 cents: I currently own 4 ARs and 6,or 7 if you count "being built" AKs,or 8 if you count a Saiga 12 as an AK.. Both are great weapons. 2 completely different weapons as well. You can add all the "tactical" goodies you want to an AK. Still not "tactical". The AR feels like a precision instrument in your hands,almost like a scalpel. The AK feels like a piece of foreign military history,feels rugged as a big heavy club. I would say go try out a couple of each,and make a decision after that.Neither rifle will do what the other will,other than get a lot of lead downrange in a hurry. When I shoot my AKs,I dont even bring a case. When reloading a mag,or walking down to the target,I drive the bayonet in the ground and go. If I bring an AR,I also bring a case,lube,tools,and cleaning supplies. The rifle is never set on the ground,and is cleaned when Im done shooting.( I do agree with Nate,the military wouldnt use something that needs non-stop maintenence,and they aren't as finicky as some would say,I just keep mine as clean as possible) If you want the best compromise,(and nobody else seems to agree with me), I would look into a Daewoo DR series rifle. Or maybe a Galil.The Daewoo is still a .223,but a lot more forgiving,sort of an AR/AK hybrid. Less finicky gas system,adjustable as well,the DRs take AR mags,and aftermarket stocks are available. Built in optics mount. If I was looking for a do-it-all rifle,I wouldnt hesitate to buy another one. Mine is really accurate. As were the other 3 I've tried. Ill put a couple pics up in a few minutes,Not trying to sell you on anything,just something else to think about...
Also,as for the AR I just bought needing tweaking,this is the first time Ive seen one need it in person. My buddy shoots a lot of comps,and has seen countless big dollar builds. He said its not common,but he has seen mis shaped feed ramps like mine. 10 mins with a file,and we'll be running flawless.