Analog Gurus - What cartridge after Grado Ref 1???

Gurus,

I have the Grado Ref 1 wood body ($350) at the moment after giving away my Koetsu Rosewood.I need a cartridge that will blow me away when the needle hits the grove for $1k or under compared to what I have.

Tried this and some other fancy cartridges so far that was well over $1k and could not justify the $$$$ relative to my current Grado:

Clearaudio Aurum Beta 2
Audio-Technica OC9ML/III Phono Cartridge

I have tried the Sumiko $700 range as well.

Turntable is: Michell Orbe Ref
Tonearm - SME mk4
Tube System
Phono Preamp: Nelson Pass X-Ono

Appreciate the suggestions

Ravi