New turntable or new cartridge?

Hey all! I've had a vpi scout w/acrylic platter/jmw9/sds for 10+years now with a dv xx-2 then a shelter 501/3 (most recently). 

I'm gonna spend up to $3,500 and want your opinion: 

new cartridge like like a koetsu goldline black?

OR

new TT like a vpi scout 2 or prime?

thanks!!!