need an amp...

I have put together some components;

Rega RP1
Accuphase P300 preamp
Vandersteen 2CE's need cables for them also.

powering it with an Adcom 545II and need definition in the bottom end and sounds muddy to me.

budget is up to 800.00

I listen to a lot classic rock late 60's to mid 70's, some jazz and Blues.