Ceramicspeed is the premium option. Kogel is a great brand too, US mfg'd, offers nice colors and stuff.
I will eventually replace the RD cage on my TT bike with a OSPW system. I recently replaced the RD jockey wheels on my trainer bike (11s 105 rear mech) with Kogel. Went through their customer service chat and had a great experience.
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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste