GerryC:
I have an Omega 50 (also built in a SCA-50 box) Control Amplifier that I enjoy very much, which I purchased a year ago from a long-standing AVA customer, although obviously, the Omega 50 is nothing like my Insight gear. I don't know where the Omega 50 compares to the Super FET Two in the AVA lineage, but I don't think that there is an upgrade path for the Omega 50.
Welcome to the forum.