Threshold SA/3 to Pass Labs X250 comparison?


Anyone done a head-to head comparison of Threshold SA/3 to Pass Labs x250 or owned or auditioned both amps? I've owned a Threshold SA/3 for many years and am considering an upgrade to the Pass Labs X250 -- assuming it is an upgrade. I like the SA/3 but want a bigger, deeper, more transparent soundstage -- within my budget. I understand the x250 is more musical than the 350, is a big move up from the 150, and I just can't afford the .5 series.

Thanks for your feedback!

The rest of my system is:
Resolution Audio Opus 21 CD DAC/Transport (running direct to amp)
Mirage M3's (bi-wired)
Cardis Cables and interconnects
audio_not_fishin
Null1, if you think the X-350 is better then the X-250, I recommend you audition a X-350.5, I believe you would be amazed at how much better the .5 is then the orginial 350 across all sonic factors. I kept my Aleph 1's after audtioning the first generation X series because I did not find them as to be as musical, even though they had much greater details/clarity/extension, but the 350.5 has the virtues of the X series with the warmth/musicality of the Aleph series.
I made the switch from the X350 to the X350.5. The upgrade was substantial. Tube like sweetness with great bass detail. Many of my audiophile friends now have this amp on their wish list.
Page 12, I'm hoping you've now spent some time with your x250. Please share your views versus the SA/3 you sold. Good move?? Thanks,
Has anyone made comparisons between the Threshold S500 Series II, Threshold S550e, Pass X250 and Pass X250.5 's?