Audio Note IQ1 cartridge experience?

I own a Grado Sonata 4.5 mv cartridge and am thinking of buying the Audio Note IQ1 to replace it.

I get a hum with my Rega arm using the Grado. Also I am gravitating toward an all Audio Note system.

Any info about the IQ1 is appreciated, if you can compare it to the Grado all the better.

thanks

Phil