As for sonic differences I can't comment as I haven't heard the models you are interested. FWIW, I have owned a PV11 for about seven years and it has been absolutely trouble free. I enjoy the sound the PV11/premier 11a immensely. I can and do listen for hours on end. I have never looked back after buying the PV11 and I use the phono section of the pre also. It replaced a Apt/Holman solid state and to my ear the tube system brought "life" to my system. Other than hitting the lottery and buying an ART or 16 this is the preamp I am sticking with.
Have Fun
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