Durock stabilizers are great and pretty affordable. I have used the plate mount and screw-in ones. I actually prefer the plate mount. The screw-in ones are more stable* because they mount to the pcb.
Not sure about super good stabilizer but my Epomaker Galaxy70 seems pretty good. I replaced the switches with TTC Silent Bluish Whites (tactile) and it's awesome (to me at least). It's got a slight ...