I have owned either 7 or 8 mini 14s, and am on my 4th ar. On the 14s I glass bedded the action, floated the barrel, and the trigger on them, when done right are sweet. A couple of other little tricks and they shot very well. My reasons for settling on the ar finally was parts such as mags, being as high or higher in most cases for the mini 14, and not as available. Repair parts are the same in my opinion. Out of the box, even an "M4" Bushmaster, has a chrome lined match barrel and chamber, with the real problem being the trigger, which one can either replace or in my case, custom tune to fit my taste.
The point-ability of the mini-14 is very appealing to me, as is the asthetics, but one must go for the most bang for the buck, in this case. Go AR.