Quandary

@rvpiano not talking you into this deal. But the XA30.8 is a great amp and with your tube preamp you will have fatigue free listening. If you can get a hand setting it up, buy used. The XA25 should be great as well. I respect benchmark but am not a fan of their house sound. It’s a personal choice.
 

The XA30.8 operating temperature is about 104-107 degrees Fahrenheit. If heat is a consideration. Other than that I can’t think of any other drawbacks. Don’t worry about power cords. Whatever you’re using on benchmark should port over just fine. If not then the stock cable will hold you over as well.  

30 watt amp and 60watt amp can be same? That too one is monoblock!

Cannot be, not at all.

Why you have to pay when he is pushing the product?

For $300 one can buy decent amp.

Man is testing your wisdom.

Pass on the PASS!!!  I've had the honor to listen to your system. It sounds awesome my friend...Sit back relax and enjoy...

Honestly, I wish more dealers would offer this kind of service.  I would gladly pay the $300 to hear a new component in my home (with the understanding that the fee would represent the extent of my obligation should I not decide against future purchase).  How many of us have bought a component and then determined it’s not what we heard at the dealer?  Seems like a small price to pay.[

Just one question: How will you feel about losing the $300 if you don't like the sound of the Pass amps in your system?