MF Tri Vista or Nu Vista Amp or Pathos Logos

Thanks for the responses.
Second hand Nu Vista goes for around 500$ cheeper than Tri Vista but on the other hand is 1-2 years older.
I need to decide which one to go for.
Recently auditioned KW500 and was disapointed.
A308 pre/power combo sounded better in the same system.
Warmer and smoother.
So it will be either Nu Vista or Tri Vista.

Ever tried Accuphase?
Accuphase produces some of the best integrateds in the world, for the price you pay for Nu-V or Tri-V, you can get an Accuphase E-407/408, or even stretch a little bit to get the E-530.

pathos is more musical tha the music fid and better built

I own the tri-vista integrated amp and it is superb. I think it in some way it is better than the kw 500. I think the Nu vista is probably a little more "colored" but others may say the opposite is true. The Nu vista was also available as reasonably priced separates. I think that you should get the one on which you can get the best deal because I doubt you would be disapointed with either, and if you are you can likely flip to the other at little additional money. They are both excellent

The Nu-vista sounds more smooth and involving than the tri-vista.But the Tri-vista has more control and drive in the low freq. The sound is more analytical than the Nu-vista is. In some situations It can ben a little harsh. I did a lot of demo's for the distributer of Musical Fidelity, so I know them both very well. Why where you disapointed in the kw500?