My .02, is hold out for a MS460, buy the dual port muffler for it, and install the .70 jet and you will have a saw that runs extremely well and is very versatile with a 25" bar, you can also run a longer bar if needed. That's how mine is setup. I basically made it like the old 046 magnum saw. I do 95% of my work with that saw.
The 440 is a nice saw as well, but I prefer the extra torque you get out of the 460 for most of what I do. I fell a lot of trees and have to limb them and cut them, and that saw works very well for me. Since I don't climb, I don't really use the smaller saws ever, and if I need to cut something big, I grab my MS650.
I'm not a fan of the 441 or 461 as they got even more choked up, but if you can still do the same mods to bring them back to full power, I'd say go for it. Also, if you aren't already, avoid ethanol blended gas to aid in longevity.