Going from Project Phono to DV P75 or Gram Slee


If I go from a Project Phono Box to a Dynavector P75 or Gram Slee ($500 to $900 range of phono stages), will I see that much improvement? I do notice that the Dynavector has 8db more in gain for MM cartridge. Wondering how much easier that will be on my amp. I do like the Dynavector cartridges (or similar) and plan to try a low ouput MC in a year or so.

System is Prologue II/Rega P5/Dynvector 20XH.
plinko
I started out with a Creek OBH-15, which i thought sounded really good, then based on many, many recommendations upgraded to the P-75, the difference that i noticed immediately, were a more quiet background, and higher resolution, everything sounded alot clearer, overall i'm happy with the Dynavector (especially if you use dyna carts. it's a no brainer)
Well, I guess what I am saying is that, being a vinyl newbie, it's hard for me to imagine a big improvement because I've discovered how good vinyl can sound. (I went from a Radioshack table to my current table)
Plinko,I have used Klyne,Vendetta,EAR,Krell and Walker Signature&Reference phono stages.