Next upgrade for vinyl rookie

Being new to vinyl, what upgrade would be recommended next with a budget of $300 to $400.
My system:
Rega P2 turntable
RB250 arm w/Heaveyweight counterweight
10x4 dynavactor cartridge
Project phone box
Ringmat
ASL 2004 preamp
Odyssey 2 channel amp
Would a new table or upgraded tonearm be next?