I agree with what Craig has said.
In an ideal if the amp does what it does, it should be pretty much out of equation. Let me give you an analogy here. Hope my assumptions are right..
Amplifier Design is like mechanial Steering of a car. One has to do a lot wrong to make it worng. Where as Speaker Design is like Electronic Steering of a car. A small correction can have a much bigger difference in the output.
So again, in an ideal world, Amplifier should be fit & forget but I guess there are several factors and the design + house tuning of various brands add more variables to the equation.
Also, speakers swapping is not realatively easy given the physical dimensions and kind of care needed to synerigse them in the room. So getting speakers that you like is more important and my budget goes more on to speakers.
Having said that, price of a component is, IMO, the marketing team's perception of how much consumer is willing to spend on their brand. Since I have lived with a Classe Amp & Jolida Amp, I can say that Classe is not so many times better than a Jolida Amp and given a right sensitive speakers both sing almost the same.
I had burnt fingers with cheap chinese brands as well as snobbish big named exotics. In the end I reached a place where, I let my ears decide and buy the components which will be supported by my dealer for next few years till the time I feel like I need a change.
YMMV.