OP: All three contenders on your list are excellent amplifiers in their own right. I'm surprised that one particular dealer here is making a bold proclamation that Coda is better than Luxman without any supporting data. The truth is that at this price point, it's not about which one is better in general, BUT which one is a better fit for your preferences, speakers, and room. IMHO, it's silly for people to objectively state that one is better than others.
BTW, you should also include Ayre in your list.
BTW, you should also include Ayre in your list.