Just getting back into listening to music and returning to vinyl (loving it too) and have a phono stage question. My C-28 is 1980 vintage and never had serviced as i never had a reason to. Now that I’ve added a turntable (Rega P3) I’m wondering if adding an external phono stage would be an improvement over the C-28. I’m using a MM cart (Exact 2) and would like to stay in $500 range for a phono stage if one would make an appreciable difference. Thanks in advance for your guidance.