Losmandy is still the best.
Wanting rigidity with mounting such a heavy scope, I bought the Losmandy plate because it is much thicker than either the Celestron or the ADM versions. The Losmandy plate also has laser engraved laser engraved scales on the sides that help with repeatability when setting up.
Very good. Fine machined product.
I have used these before, and I recommend Losmandy!