@essrand We are in the same boat, I ordered my tdai-3400, but I'm still waiting for it to ship from overseas. I'm hoping it supplants my 300b amplifier as well, but if not, I'm creating a second much larger sound room and keeping the new speakers and tdai-3400 in that listening space with its awful acoustics that hopefully the 3400 will tame. I don't think I will be able to sell my SET anyway, it's too gorgeous sounding to sell.