Hi David,
Hard to beat JT sprockets, they seem to last pretty darn good. Nobody is going to say anything bad that you are looking at DID and RK chains either. And the same for Vortex rear sprockets. Unless you are racing or a track day junkie, stick with steel sprockets like you have.
As far as other brands,
Sunstar, Renthal, Volar, Vortex, EK, SuperSprox, Bikemaster
They are all decent in their own ways.
Good luck!
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