Cartridge recommendation for classical listening


I have a wonderful sounding Grado Reference Sonata cartridge which I love.  The only problem is, for many years, I have had a hum problem which I have investigated extensively but never found a solution for.  I know Grados can have this defect, and the extensively modified Rega P3 turntable I use can contribute to the problem
So,  I’m ready to give up and go with another brand of cartridge.
I listen almost exclusively to Classical music.  Can anyone suggest a cartridge under $1000 that sounds good for classical?
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I think this article could be interesting read if you want to know the opinion about MC coloration from professionals.

Anyway, personal preferences is just personal.  

Elliptical stylus has very short life span compared to LineContact and Micro Ridge type of styli. 
Based on the bad opinion of the Sumiko stated here and also the purported extreme fragility of the Sumiko I’m thinking of returning it.
The dealer is giving me the option of the Clear Audio Virtuoso cartridge.
I don’t think I can get a refund.
Any opinion about this cartridge vis-a-vis the Sumiko.
 It’s either one or the other.
?? It sounded like you enjoyed what the Sumiko was doing!

I would still consider getting the motor grounded in your turntable. But some cartridges are less sensitive to that noise (Sumiko) and there is an old saying I'm sure you've heard before- 'if it works don't fix it'  :)

I've had good luck with the Sumiko cartridges. Like any other, it must be a good match with the tonearm.
The problem is not in the hum (there is none) but in the hight end.
Whenever  the volume is turned up there is a harshness in the treble.
Otherwise the sound is really exemplary.
@atmasphere Ralph, his version of Sumiko is HOMC, not LOMC. 

@nandric Nikola, if i remember correct you owned Clear Audio Virtuoso