Well, I've only owned 2 macs. and one was a 1010. I got a bad taste from the macs, they were both cantankerous SOB's. Ran great in the shop, wouldn't start, or run right in the woods a lot of the time. My dads XL12 hasn't had a new spark plug in at least 15 years. As a matter of fact, the only thing thats changed on that saw in 15+ years is the air filter, and about a dozen chains. I have to lean towards the XL-12 as the saw in this thread.
I will say that my bad experience with macs, was about 15 years ago, so I'm guessing the saws were at least 15-20 years old, or older at the time. And I didn't know 10% about saw maintenance as I do now, so that maybe had a lot to do with my problems.. But on the other hand, the Xl12 lived through my dads learning curve (his first saw), and then mine (also my first saw, thanks dad), and I bet it lives through my son growing up.