Best Cartridge for Less than $500


I have a SOTA Comet turntable with a Rega 300 tonearm and a Grado Gold cartridge. I would like to upgrade my cartridge and am looking for recommendations. My budget is $500. (The rest of my setup includes a Dynavector P75 phono-preamp and Aragon 8008BB power amp.)

Thanks.
adidio
Check out the Denon DL 103R, a great value for the money (and well under $500)...
My friend has Sota comet with RB 300 tonearm and Grado Gold prestige cartridge. He used the setup for a while, but he was not satisfied. After consulting with a seller of the table, he changed to Goldring Electra cartridge, a cheaper one. But he likes it better.

IMHO, Sumiko Blue point special MC cartrigde is one of the best at under $500.
Thanks for the recommendations. A dealer tried to sell me a Benz Micro Ace - thoughts on that cartridge for my setup?