I've put quite a bit of run time on my 500i since receiving it last month. I've put 12-15 tanks through it easily. I honestly really like it.
The filtration is not my favorite, as it's old tech on a new tech saw. The air injection on the 462 is far superior. Air injection would have made this saw an A+, IMO.
AV is real soft. I've got a video of it somewhere where I take the nose of a 20" bar on the Dolmar 79XX and the 500i and manipulate the AV. The 500 is noticeably softer.
It's good for nice comfortable cutting. I'm just not sure on how much abuse it will take. I've read about a few instances where guys were roughing the 462 up and broke AV mounts.
I'm sure it's a cheap and easy fix, but again, for the price of these two saws they shouldn't have to be put in the truck while the backup saw handles the cutting duties.
If I were a full time logger, I'd probably throw my money at a 572XP if I wanted a 70-80cc saw. Arborist duties are where the 462 and 500i shine IMO.