If you can only choose one of these Amps

I agree with Jbello but since you asked, I would pick the Classe CA200 because it has a wonderfully warm sound to it. the McCormack DNA125 is leaner, like the Krell (I had a KSA100 for a while) and I don't enjoy it as much as Classe. Jeff Rowland is very nice too but more expensive in general than your list (or less power). Same goes for the McIntosh MC202 - a very sweet and rich sounding amp. Depends what type of sound you like though. Some people like it leaner - listen to whatever you can in your own system and decide for yourself. Arthur

The Classe,..on the used market, most everything they make is a value...and sound like music.

Thanks Guys,

I sometimes quite confused by watts and current. Which one should I look into to determined how well can an amp handle speakers? What happen to amps that do not go down to 2ohm?
can they give good bass? at what frequency range a speaker will dip into 2Ohm? I'm using a Hales Revelation2. 6ohm 86db
acoustic suspention design 3 way with 8" woofer. Driving these are Electrocompaniet ECi3. Class A 70W @8, 120W @4,
160W @2. Source is Cary 303.

I've had a Classe CA 200 for about 6 maybe 7 years with no disire to move on, surround it with reference level components and cables and it gets better. The ca 200 doubles down to 400 at 4 ohms, I drive Thiel 3.6's to loud levels with no strain or congestion.

There is no clear spec for knowing how an amp handles a certain speaker. The relationship between power and current is Power = voltage * current, so it depends on the voltage which is where marketing comes in. How the power is measured is also dictated by marketing. All you can do is make a "rough" approximation of what an amp can do with the power rating. For your speaker specs, I would say look into 200W or more. How do you feel your ECI3 does - is it weak? Perhaps you don't need much power - depends on your preferred loudness level and room size too. Arthur