I have a very nice 262xp. Irreplaceable. Unfortunately. I also have a 590 Echo. I had a OE ms362, which is a very, very nice saw wrt power and antivibe, as well as being a decent handling saw - much better than the CS590, but not in the same league as the 262. I have run a 361 (irreplaceable saw also), and a 562xp.
Undoubtedly, I like the older saws better. I sold the MS362, not because I didn't like it, as it truly was the nicest to run between my three 60cc saws at the time. Similar power to the 262xp, tho not as "sporty". Best antivibe by lots among the three, and a much better feel than the Echo tho not as handy as the Husky. I sold it because I didn't trust the strato technology for longevity. I don't want an autoboom or moronic saw. Period. Just me. Don't need it don't want it. My ms362 was not a mtronic saw, btw. It ran better than the mtronics, contrary to some opinions. I've run mtronic 362's too. Kind-of shrieky things (lean) with thin power in the middle relative to the nonmtronic model, imo.
are the cases destroyed on your 361? If they are good cases you could rebuild it.
I haven't run an Echo cs620, I own a 590. It is a workmanlike saw with pro case construction (that's as far as the "pro" goes, btw), farm-saw porting , ergonomics and antivibe. It is a workmanlike saw. Good, good saw but not particularly exciting overall. The best value in a farm saw by far.
Short story, you are basically stuck between paying lots for a stihl or husky pro saw which is far more complex than a saw needs to be. Maybe you like that? IDK?
- Or buying an Echo, which is likely to run and last a long time with basic maintenance. The 590 is uninspiring; kind-of cheap antivibe that works pretty well with very nice, strong power, but no real thrust of top end rush that you get with a nicely ported "pro" saw. Perhaps the 620 is close. Maybe...probably not. It won't feel as nice in the hands as the stihl or husky, but it will cost less and probably last you forever as a firewood saw. The 590 is a really nice little bucking saw, for sure. I don't think I would consider the 620 for the small upgrade I believe it to be. Could be wrong there..
anyway, pretty wordy, lol, but I hope this is a little help.