i'm thinking of trying out a dedicated phono stage preamp to go along with the champion w/unify tone arm thats on it's way to my home. I recently came across a used clearaudio basic and was wondering what changes, if any, there have been between the basic and basic plus now offered by clearaudio? and of any of those changes make for major improvements that shouldnt be missed regardless of the deal i might be able to get on a used piece of equipment that been treated well?

thanks,

this is my first post here, i hope i've gone about it the right way.