I don't know if this is too late or not, but I needed to put a 2nd system together for a house I rented and I listened to the Revel you are considering and I thought they were OK. A while back, I had your Def Tec's as part of a small theater. For the application, they were pretty good. When auditioning the Revels, I wasn't sure if they were for me, along with the rest of the speakers I heard. I wasn't planning on getting floor standers, but the Dealer sold Vandersteen's as well. I'm a big Vandersteen fan, but I always overlooked the Model 1's. I never bothered to listen to them until that day. You'll need to listen for yourself, but I thought they were in a completely different league than the Revel. They're also very easy to drive so you can use your tube amp with no problems.