Pass x250.5 or Bryston 14Bsst² ?

Does anyone have experience with both the Pass x.5 series and the Bryston sst² series? If so, which would you recommend? I think I've narrowed my choices down to these 2 amps, though I can't decide between the two. I have heard both, but not for a long enough audition to really make a decision.

Speakers are Von Schweikert Unifield 3