Don't do it.
The best Macs ever made were 2011-2016. I'm still using my 2011 model even though my 2017 has long since failed and been junking and my 2020 (intel model) still runs much worse than the 2011. If the 2011 ever breaks, I'd look for a used pre-2016 model to replace it before buying new.
The new gen Macs blow away the legacy Intel models. And I have (and love) the older Macs you speak of.