I had a Counterpoint SA-220 upgraded with the basic and some gold modifications. It is not as bloomy as the stock amp that I own but that could be due to using Amperex Bugle Boy 6DJ8s in the stock amp. The modified amp is more natural sounding, faster, tighter bass, better details and overall not as warm sounding as the stock amp. Worth the price of $2K over the stock amp, yes but I still enjoy the stock amps performance too especially for the price. Only two tubes 6SN7s (VT-231s) so tube rolling is very easy. The Counterpoints are SS output with tube input, not sure about the others mentioned here. Best to find one that someone has already modified as you can get them much cheaper then having the mods done yourself.
Happy Listening
Happy Listening