You could sell it and pick up a good 60cc with 18"/24" bars and a couple loops of chain... It'll be more versatile and lighter.
You could also just throw a 20" on the 460 and run it.. It'll be a hot rod and simpler than selling and buying another. I ran a 20" on my 066 for years because I have no need for a longer bar in this area.
I wouldn't go as short as a 16... 16 is only good at limbing.. You'd be surprised how much easier a 20" is to swing around compared to a 25. The Stihl bar mount is really common so you could probably find a used bar or even borrow one to try out and see if you like it.
You could also just throw a 20" on the 460 and run it.. It'll be a hot rod and simpler than selling and buying another. I ran a 20" on my 066 for years because I have no need for a longer bar in this area.
I wouldn't go as short as a 16... 16 is only good at limbing.. You'd be surprised how much easier a 20" is to swing around compared to a 25. The Stihl bar mount is really common so you could probably find a used bar or even borrow one to try out and see if you like it.