Since you have the 250.8 stereo amp, I can compare it to the 260.8 monoblocs. I've owned both in my system. The sound is very similar, but the 260.8's are even smoother, they operate in Class A higher than the 250.8, and better dimensionality with wider, deeper soundstage. I was using the XP22 for both. Again not night and day differences, but worth the extra price in my system.
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SF Stradivari, Aric Audio Motherlode XL preamp and Super KT Parallel amps; Pass XP 27, Raven One TT, Graham Phantom II arm, Lyra Etna Lamda, Airtight PC1, Bryston 3.14 DAC, Transparent Reference & Wireworld, dedicated treated room 17 X 34 X 9
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