I have the omegastar in my HT, and the FetValve in my 2 channel setup. IMO, the FetValve is just a better sounding amp, more impact, more dynamics, better transparency, and smoother. Not that the Omegastar is a bad amp, far from it. My omegastar started out as an Omega III (the prior model), and the Omega III was so good I sold my Odyssey Stratos amps after hearing it. The Omegastar is certainly a big step up over the Omega III in detail, impact, and speed. But the FetValve is truly something special, able to match amps that cost more than it's 2 grand price.