@dhl93449 - thanks for the added information. I did preface my comments on the offset adjustment for FET transistors was specifically when used in an input stage - such as comparator circuit or a discrete operation amp circuit, where you need an exact mirror pair of transistors (whether FET or bipolar type). Monolithic FET op amps (such as OPA627, OPA2134, etc.) are laser trimmed during manufacturing and the offset is excellent. I was only trying to give the OP more detail on transistor types.
I didn’t know about the larger number of transistors slowing down the slew rate. That is useful information when I look at different amps. Though, I have listened to the Emotiva XPA-1, with 24 transistors total (12 per differential side). There’s nothing slow about this particular amp. :) Though, a Class A bias might slow down the slew rate - possible more specifically on the negative slew direction.