My birthday is coming up this summer and I want to add an amp to my 2 channel system, budget $400 max. Used is fine. I eventually will upgrade to a better pre-amp, but that will be later. I plan on keeping the KG4's until I die.

I was thinking of an Emotiva UPA-2 new or a used NAD, I have seen the used 2200, at least 10 years old, go for $250 or so.

The Emo headquarters is near my house so I could try a UPA-2 and easily return it.

I was wondering what you guys think would be the best fit for my 2 channel system.

Thanks