Most used is prob the 562 but I cut a pretty equal amount from limb size stuff all the way through 36in and up stuff and oldest is prob the 395
Well that gives you a couple logical choices. There is a new version of the 562. Dubbed the 562 mark II. Or you could look to replace the 395 with the more modern 592. Both great choices and should feel familiar and be compatible with your current bars and chains given your Husky saw line up. Of course CAD doesn’t always jive with logic. If you wanted something different you could check out the Stihl ms400. It’s pretty sporty out of the box and weighs a little less than your 562 with more power.