More expensive = better?

I had a Parasound Halo6 integrated amp @$2500.00 and moved on to a more expensive integrated @$6500.00.  It was a night and day difference for the better with the kind of sound where I can’t wait to turn it on daily.  The newer integrated is a different brand so that is one reason it sounds different and better to me.   My experience may not be the same as yours though. 

No it is not certain that a more expensive integrated will sound better than a cheaper one, especially not jaw dropping better.

If you can't listen to the more expensive integrated, preferably in your own system before buying, do a lot of reading and research, buy used and take your chances.

It depends. If it's a better match to your system it's going to sound good, if it's not a good match your results might be mixed. 

It depends onthe integrated 

The only person that can make that call for you,is you.  Try an in home demo.