Pass INT-25 better than Wilsenton R8?

Not only the Pass amp needs around 200hrs of break in, it also needs at least 1hr of warm up every time you turn it on to do some listening.
Give it a chance. Don’t think about trying to hear a $5,000 improvement. Just enjoy the music and you’ll be able to pick out subtle details and qualities you haven’t heard before. The refinements don’t always jump at you right away. 
Good luck!
 

When I bought my XA25, I was instructed to leave it on for 5 days playing music through it.  It does sound better if left on all the time.  The instructions say warm it up for 1 hour.  As long as the amp is in Class A, this amp sounds great.

This is my end game amp.  

@travisg 

Many of us, myself included, read the reviews and get caught up in the hype. We expect “wow” moments. Unfortunately, that can make the journey longer towards satisfaction longer. I would forget trying to pick a part different elements of sound quality between the pass and your tube amp. Ask yourself if you are as musically engaged. Do you still get goosebumps moments? If not, I would move on.

$7500 still doesn't buy you something that sounds good right out of the box?

You mean you have to WAIT for it to supposedly sound "better?"

+1 tablejockey….what a bunch of nonsense