Really it depends on what your reasons are for wanting to move from Let's Encrypt to an alternative.
Are you looking for something that has a higher level of validation than LE, or you have some kind of problems with LE certificate installation or renewal, or something else?
What are the sites that you are looking for SSL certificates for, if they are just personal sites or even small company sites that don't take online payments and process them on your server, then I think that generally a cert from LE is just fine.