kalili,
That Walt Yung-designed preamp/phono stage was exalted in its day (not to imply that is it not still excellent at that price point) and should be ample to give fine sonic results with your current TT/cartridge.
Should the upgrade bug prove irresistible, I submit that you first try upgrades to the cartridge (within the gain and loading parameters of the GFP-565's phono section and careful compliance matching with your tonearm's effective mass).
Dave
That Walt Yung-designed preamp/phono stage was exalted in its day (not to imply that is it not still excellent at that price point) and should be ample to give fine sonic results with your current TT/cartridge.
Should the upgrade bug prove irresistible, I submit that you first try upgrades to the cartridge (within the gain and loading parameters of the GFP-565's phono section and careful compliance matching with your tonearm's effective mass).
Dave