Looking for a small form factor amp to drive older B&W speakers of 90 db SPL. Preamp is a NuForce HAP-100. Not looking to rock out the house but would like good dynamics for jazz and classical, primarily. I have read good things about both amps here on AK. The Volt + D seems like a good value but would it be outclassed by the NuForce? Any benefit staying with the NuForce brand?