you can always look for a dealer with a great return policy. some offer a trial period. many online dealers haveĀ a trial and return policy. much gear is over rated and people tend to promote products they themselves own. maybe prima luna or mystere tube amps are nice, but most reviews for those amps tend to focus on fit and finish. NAD has a great reputation, and I have found Marantz integrated amps to be clear, yet smooth. Jolida amps are a great value. And especially if you get the factory upgrade. Rogue is over rated I think. I know from listening that the Jolida Fusion 3502S amp sounds better. Sometimes we just get tired of what we have, and the sound grows dismal. If you want to change then do so. Sell the NAD. You can get a decent price for it. Check out Schiit brand.