Not getting into the why's etc becasue it's been said so many times just search forum. But in a nut shell for best performance it boils down to 2 setups. NONE include the TB based chips.!!

Motors less than 2nm then go with 50V drives running 42-44Vdc.
Motors above 2Nm then go with 70-80v drives running 60-70Vdc.

Buy digital drives likes been suggested if you have the money has they are worth every penny.
Personally I'd just buy 80vdc drives and 3Nm motors running 68Vdc as they cover a massive machine range and allow excellent performance on any machine large or small.