Thanks for all the responses. Yes I have read the opamp articles. Good and interesting information. This Kinki IA really does not need an opamp upgrade but there are improvements if you do so. Just like everything else in this hobby there is always a tweak out there. For everything. Some audible others not so.
Modwright KWI200 vs Kinki Studio EX-M1+
I am trying to decide between Modwright KWI200 (8 years old) and a new Kinki Studio EX-M1+ amp. Currently have Magnepan LRS, Gemme Katana Itokawa, and Zu Dirty Weekend speakers (all with with JL Audio sub) in rotation. Listen to vinyl, CD, or streaming from Node 2i. Mostly listen to 60, 70, 80, 90's and current rock (and folk) music but blues and jazz mixed in. Any opinions appreciated.