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?
128x128rvpiano
but as an owner of Grado and a Nakagoka - they are both sweet but do sound different on a Basis Rega OEM300 arm. The Grado has the edge in midrange magic and lushness, the NAK is more incisive and daynamic - particularly in the low end and lower mid bass.

IF in NY Nick At Audio Connection is awesome TT setup guy.
None of these guys have ever run a Rega cart in a Rega arm . They do
not know what they are talking  about .
The idea that you have to match the brand of cartridge to the brand of arm is ridiculous.  It is the kind of nonsense hype broadcast by Rega which sells a lot of arms and would like to sell a lot of cartridges, some of which are simply re-badged and repriced from other manufacturers.  Over at AA where lots of systems are listed, most owners of Rega TTs who list their cartridges are not using Rega cartridges.  Now, some of Rega's MM cartridges may be terrific.  I wouldn't really know as I haven't considered MM cartridges for many years.  But I have friends who have found success with Ortofons.
My local dealer recommends the Sumiko Blackbird High output MC cartridge.
An Absolute Sound 2020 review raves about it.  Of course, I know they rave about everything these days.
But still........ 
Dear @rvpiano : Due that you really like that Grado cartridge what you have to do is to follow the atmasphere advise . Read again his post and the advise coming from he I know will works and you will be really satisfied with.

R.