For my work, I run 372xp OE's. I find them to be one of the best running, longest lasting, and easily repaired saws still in production. I also have a 395xp for bigger stuff that doesn't get a whole lot of use, but when it comes out it's usually an all day affair, stumping, ripping, or cutting trees that require a 36 or 42 inch bar. Not long ago I repaired a 460 rancher that had been doing fence work for 13 years and never had the top cover removed to check the air filter. Entire engine and flywheel cover was packed off with oily sawdust. Saw was getting hot and had developed an air leak through deteriorated fuel hose. Cleaned it up, replaced the hose and primer bulb and it's back in service. Never would have missed a beat with proper care. I've had a few issues with the autotune on a 576xp that I had for a short while, and there are many newer Husqys that I don't have much experience with. Just like Stihl and Echo, they've got winners and losers.After putting my Husqvarna through some pretty tough weekends of cutting firewood, curious how long have your saws held up under heavy use? Are there any specific models that you think are particularly durable?