Sensible upgrade from Denon DL160

Hi all,

I'm looking for an upgrade from my DL160 Cart running on a Rega P25 (With Groovetracer mods) hooked up to a lehmman Black Cube.

I'm happy with the overall sound, I guess where I see weaknesses is vocals can sound metalic and bass feels a little flabby at times. My musical interests are varied, mainly rock (new stuff) and jazz (old stuff). I like the overall warmth of the denon sound just looking to refine it I guess.

any suggestions greatly appreciated - $500-$700 tops and I'm willing to look 2nd hand

thanks!