Nain Audio

I have a complete Naim 500 Series rig, including the NAP 500 amp, the NAC 552 pre-amp, and the CD555.   Additionally, I have a Kuzma Stabi XL TT and a Revox R2R.  I am seriously considering upgrading to the Naim Statement amp and pre-amp.  My question is, does anyone have experience with both the 500's and the Statement?  I'm trying to discern just how much of an improvement over the 500's the Statement provides.  
Thanks , in advance, for your help!

Mitch