Hi all. I have a foolish question. I owned a couple of the 064's a few years back and loved 'em. I have been running Huskies the past few years. Now I am contemplating buying another Stihl. I am wondering though, what are the differences between the 066 and the MS660? I had run an 066 a while back, and was impressed. I have been looking on ebay, and can get one for about half the price of new. So, I am looking for some advice from all you guys experienced with Stihl. 066 or new ms660?