Take a look at High Logic Main Type while you are looking at Font Management.
http://www.high-logic.com/font-manager/maintype.html
I dont know if its the best ...but I like it.
It does not integrate with Premiere as such ...but it works nicely alongside it.
eg ifg I need to load or unload a font...I open it alongside (any Adobe graphics app) and do so.
Its value is that one can group Fonts as one would wish, load / unload whatever...whenever and view fonts clearly and simply in the window.
