I've had a Bosch 10" sliding bevel saw for about 35 years. Works perfect now and from day 1. It will outlast me. But, if I was going to get a second miter saw, which I am often tempted to, it would be smaller, not larger. I am thinking about the cordless Makita dual bevel.
https://www.amazon.com/Makita-XSL02...words=makita+miter+saw&qid=1568421997&sr=8-14
How often do you expect to bevel 4" lumber? Do you make a living on 4" crown molding? If so you need a 12" saw. On the other hand, a 8" or even 7 1/4" slider will do a huge amount of trim and hobby work and is much easier to move to where you are working.