Pass INT-25, split decision and maybe option?

Let me throw in the Don Sachs Valhalla tube integrated as a possibility. I had the Linear Tube Audio z40+ integrated which is more expensive than the Valhalla and I thought the Valhalla was significantly better. It has about 33 watts per channel (you can use 6L6s, KT-66s, KT-77s or EL-34s and it is auto-biasing with a meter to check the bias of each power tube easily in front). It has one balanced set of inputs and a nice remote. I've had one for a few years and love it. It is lush, fast, detailed and adds detail and bass that my previous tube integrateds (the LTA and Rogers) couldn't match. 

I spoke to Lynn Olson at Pacific Audio Fest a few years ago who told me that the Valhalla, in his opinion, was as good as integrateds costing three times its price. Additionally, even though the Valhalla has 33 watts per channel, it easily drove 4 ohm speakers with 88db efficiency in the hotel room it was in. 

http://www.dsachsconsulting.com/valhalla%20integrated.html

For less than the cost of the 25 integrated just add a Schiit Freya + to the XA-25...you'll get more of everything (inputs, outputs, tubes, no tubes, etc.). I use an original Freya with mine (XA-25) and the resulting sound is killer. Gain a-plenty.

I recommend a Prima Luna tube integrated. It’s the easiest way to own tubes, and they sound amazing. You can roll tubes easily without worrying about biasing or flimsy tube sockets. You can choose the tubes that work best for your speakers. If you want the most functionality, go for a PL EVO 300 or 400 integrated. I have a little EVO 100 integrated in my second system, and I’m running a set of TungSol 6550’s to drive GoldenEar Triton 1’s. AMAZING midrange, clarity, and a soft, beautiful top end. The bass drivers in this speaker are powered, so I don’t need to tax the amp that much. Your speakers are pretty efficient, so a PL EVO 100 may be all you need. I love PrimaLuna. I have an EVO 400 pre-amp hooked up to Pass Labs XA 60.8’s in my main system, and I’m driving Dynaudio Confidence 20’s with a Dynaudio Sub 6. It sounds great! PL and Pass make an amazing combo, and I can listen to this system for hours and hours. No fatigue. By the way, I would recommend staying away from ARC products. I’ve had 5 of them, and they were all flimsy, noisy, and terribly overpriced. The best ARC product I had was an old VSi60; it was built like a tank. However, even this amp had a problem with the mute function. It was annoying. But I digress. Make it easy on yourself. Enjoy the music. Contact the folks at Upscale Audio, and they will get you all set. Cheers!

Try Lavardin.  Detailed, but rich tube like sound.

The INT-25 has been returned. It was just not working correctly. I truly tried everything I could think of to make it work, but I'm sure there's something wrong with the gain stage of the amp. With efficient speakers, I shouldn't be able to say in the room with full output of the INT-25, yet I barely hit 90dB at that point. DAC was set at full output (tried both fixed full output at 96, which is max, and variable output which then goes to 100, both set to High output) and nothing... Tried a phono stage (Andover SpinStage) which has an output of 71dB with the Shelter 501 (according to Andover, hence for most applications, I use inline attenuators which I removed for testing of the INT-25), but even with this I couldn't get the volume much more than 90dB at full output.

I spoke to Pass Labs and they're just as stumped as I was as to why it doesn't get loud enough.

I also think this is the root cause why I was so indecisive with this amp to start with... loved certain things about it, but it was lacking something. Bet that was the super low gain in the front end of it...