To be fair its pretty much the same as it was right from the start.
The teddy twin supply is slightly brighter and has less midrange which i also found impacts on the weight of the bass, the bass is good, fast and punchy, but just has a bit less weight to it. I did think it pulled more detail out, but thats down to the extra brightness i think, as its easy to hear.
Obviously the naim 555Dr has the naim sound and keeps the sound signature, it works very well together as it should.
The teddy Xps on its own, sounds ok, but if you are going from a 555Dr supply then it just doesn't cut it anymore, it just not as good in almost everything, the bass lacks the same punch, the sound just isn't as wide and its just not as dynamic. The nds really does need a better power supply.
The new teddypardo twin box lifts the performance and brings it close to the naim555dr and for the price difference is a bargin. It has its advantages over the naim and also disadvantages.
I can't see any naim555dr owners selling and swapping over, but i can see a few trying the xps + on socket 2. I can also see new NDS owners buying the teddypardo if they dont have anything to power it with, as it makes for a cheap alternative. Also anyone with a xps already, this is a great way to go.