Upgrade Suggestions for Turntable/Cartridge/Preamp chain

Getting back into Vinyl from a long hiatus. Enjoying what I have but wondering what to upgrade first if I decide to start tweaking the system.

Current chain is:
Technics SL-3300 Turntable
Audio Technica VM-95ML and Ortofon OM-20 carts (VM-95ML currently in use)
Rega Fono Mini preamp

edit:  I should probably set a budget of $1500 USD to make this more relevant.