You can do a search for the "572xp update" thread. Lot's of good info there.
I've always had a couple of good 2 and 3 series Husky saws, no need to be an early adopter of the 5 series. I now have a 572xp, ported by MMWS. I haven't had this saw long enough to say for sure, but it's likely the best saw I've ever owned. It cuts right along with anything out there.
The bonus is the autotune. I live in southern MN, the weather can swing wildly, during any season. A week ago it was 5 below, last couple of days in the 50's. Just yesterday I dropped three ash trees, one was a little more than 3' DBH, the other two smaller. With everything on the ground, and the bigger limbs cut, I set the 572 down and picked up a 346. It flooded on the first pull. It was too nice of a day, I was having too much fun and not paying attention. I've learned this lesson before, but sometimes I get lazy, or just oblivious. If you haven't run the saw recently, in the same conditions as today, don't grab it and yank the rope. You need to bottom out all three jets, turn them out 1 1/4 turns, start the saw and tune from there. The 572 will supposedly not suffer this condition. The first time I started it, I tried to follow the procedure in the user manual. The instructions seemed kind of stupid, contradictory, and counter intuitive. After about six pulls I figured WTF! I put the tip on a block of wood, grabbed the throttle, and pulled. It fired right up, and has every time since. Two pulls on the first start of the day, one pull for the rest of the day. No choke, no fast idle setting, no blah blah anything. Push the decomp, grab the throttle, pull the rope, fires right up. When the 346 flooded, I didn't bother to go get a different saw. I picked up the 572 and cut up all three trees. I don't usually wade around in the tops of three tangled up trees with a large, long bar saw. It was surprisingly easy. Very comfortable saw to use, not a chore at all. So far, it is a very small sample size, but I predict this will become my go to saw. Sorry for the long post, I just wanted to add some context.