Have heard the 3A Sigs at a dealer with both Rogue M-150 amps and also with Belles 350A Reference. Both amps sounded great, and I have a Belles 350A in my system (Unity Audio Signature speakers), so i can vouch for the Belles. Which you prefer maybe be a matter of your preference for tubes or solid state. Both will work well with the Vandies.-Mrmitch