Cartridge recommendation for Rega P-25

Need pro advice on what cartridge to get for a Rega P-25 table. I will be using a Rotel RQ-970BX phono stage. Budget limits around $500. Suggestions please.............

System:

Adcom GFA-5802
Adcom GPA- 750
Adcom GCD- 750
Rotel RQ970-BX
Magnepan 1.6QR
Sunfire Arch Sig Sub