Accuphase DP-65V


I am new here,but here I find many interest things aboute the brand Accuphase and Dynaudio,brands who I love and I use.
So,I need help ,(if is posibil),with a pertinent adviced.
My sistem is formated on Accuphase E406V integrated amplifier,Accuphase DP-65V cd player,and Dynaudio Sapphire speaker.
My question is if anybody here in comparation the cd player DP-65V with another upper model,(DP-75V,DP-77,DP-78,DP-500),and if can say me if is a bigger diference in sound if I make this upgrade,and,(I here,for exemple,lyke DP-75v is not so good in bass section lyke others..????).
And,If I dream on the future to change the integrated amplifier E-406V with a Preamplifier/Amplifier,(for exemple C-275 with P-650???).
Is a big improuvement if I make this change,or not?
I will mentioned I will only accuphase,and I keep the "Sapphire".
Please when is somebody here who have made this,experince,to tell me his opinion.
Sorry for my bad english,and thanks in advance.
puiutu62
Hi...I'm new here...I have an Accuphase DP-65, which I bought brand new and have kept in mint condition...but the right channel went out and does not send signals to the pre-amp, can anyone recommend a place where they can service and repair it? I live in Los Angeles. Thank you in advance...
Thanks for your answers,Linkster,Elberoth2 and Plutos.
If anybody can tell me more,please do that,I wait!
I have not heard DP-65V but I have owned both DP-500 and DP-67. I preferred the older DP-67 to the new DP-500. The DP-500 is very slight bit more extended in top end but it has some unpleasant coloration in the midrange. I found DP-67 just more musical and better sounding player.
If Accuphase brand is not obligatory then you may consider Marantz SA-1 it beats both by a large margin.
I went from a DP-65 to a DP-75V and the difference was significant and better in every aspect without going into detail. I held onto the 75V for 7 years.