http://www.ebay.com/itm/Antique-Sou...MM-MC-12AX7-/191657732915?hash=item2c9fb0eb33
I would be willing to try if I knew more more about compatibility with my setup, etc.
Here is the thing asking about compatibility and sound online no one can tell you, as no one has all your equipment together in your room. When selecting my front end components I had to try out quiet a few things together listening to what sounded good to me. Thats why ebay is nice to try used gear and if it's not right for you back to ebay it goes.
That said you just posted a link about MC and stepup transformers SUT.
Your NAD intergrate has no phono stage / phono input A phono stage has RIAA equalisation and you need that.
A SUT/stepup transformer plugs into the phono stage and boost the gain and matches impedance better. These where needed when most recievers only had a MM phono stage and LOMC started making headway into common use.
A Phono Head Amp does basicaly the same thing as a SUT but generaly has more adjustablity.
A stand alone phono stage / phono preamp has RIAA equalisation and you plug that into your AUX input of a reciever, intergate, preamp. These are a lot more common now a days because most new consumer units do not have a phono stage built in. This is where you are at you need a stand alone stage.