Haven't heard the NAD, Creek or Parasound, but I did own a Rotel phono pre-amp which did not sound as good as the Project I'm now using. I'm really impressed by the little Sumiko Project! (I'm using a Music Hall MMF-5
I have the Sumiko Project Phono Box SE, the upgrade of the little phono box, and I like it a lot. It supports both MC and MM; have not tried it with MC, but will be as soon as my upgraded rb250 arrives.
Currently using it on an old Ariston TT, and rebuilding a Planar 2 (upgrade motor, and Express re-wiring and JA Michell Technoweight for the arm) which I can't wait to try it on.