Arm suggestions for my Basis 1400

Currently I have a Basis 1400 table with a RB300 tone arm (stock cables). My cartrige is a Micro Benz MC20E2. I only recently got this first turntable (barely used for $1100) and I wanted some suggestions on a better arm/cartridge combo I could upgrade to. I was thinking about upgrading to a RB900 tone arm with cardas wire and a Micro Benz Ace cartridge. My preamp is a Ayre K-3x (amazing phono stage).

Please help out this vinyl newbie.

Thanks for the suggestions.

KF