Pass Labs XA30.8 vs dual F6 bi-amped

I am looking for a good high current SS amp to drive my Tannoy Turnberry SE speakers. I have heard the Pass F6 and love the tonality and speed of that amp. However, I heard the F6 on a Fostex single driver speaker so it was not possible to guage its performance on a typical 2 way speaker. I have read that the XA30.8 is a powerful 30 watter with good drive and headroom. But I cannot audition the 30.8. So it will be a blind buy which I am not as comfortable.

My question is, how will a single XA30.8 compare against a pair of F6 biamped, driving the Tannoy ? I mean in terms of power handling.