I bought this used in 2014. Everything on it says STP except for a sticker on the back from Wyred 4 Sound that lists it as an STP-SE. You can see it on the photo of the rear of the unit. I reviewed my emails from the purchase and determined that it had an upgrade to a STP-SE.
I have rated it a 7 just to be conservative. It has functioned flawlessly. It sounds great and is very versatile. I includes a home theater bypass input. Both balanced and single ended inputs and outputs. I recently bought a new Wyred 4 Sound remote control for it, which is included. My German Shepard decided that the original needed his signature. German Shepard teeth make big holes. I will throw in this "improved" remote as well. it works fine.
I am asking $1150. This includes shipping to the lower 48.