I have had both Bryston and Ayre amps in my system, albeit with a different pair of speakers (Totem's) and not back-to-back. But both in the same room with the same speakers. I've also heard both amps in other less familiar systems, including Ayre with SF.
In my own system, the Ayre was much, much better than the Bryston ST-series. Of course, Totem speakers have a more aggressive treble than SF speakers do, so my experience is only so relevant in that regard. However...it wasn't just the treble that was more controlled and refined in the Ayre - I preferred it through every part of the range, and did not consider the two to be comparable.
I've heard the V5xe with SF Cremona's, and the sound was really quite excellent - not at all what I'd call warm. The rest of the system was all 5-series Ayre gear, and the sound was wide open, detailed and relaxed. In fact, my only complaint would be that the Ayre can be a bit thin on the bottom.
I don't think that you'll be disappointed in a V5xe - but Rcrerar pointed out, your best bet is to buy one used, compare to the Bryston, and sell the one that loses the shootout.
In my own system, the Ayre was much, much better than the Bryston ST-series. Of course, Totem speakers have a more aggressive treble than SF speakers do, so my experience is only so relevant in that regard. However...it wasn't just the treble that was more controlled and refined in the Ayre - I preferred it through every part of the range, and did not consider the two to be comparable.
I've heard the V5xe with SF Cremona's, and the sound was really quite excellent - not at all what I'd call warm. The rest of the system was all 5-series Ayre gear, and the sound was wide open, detailed and relaxed. In fact, my only complaint would be that the Ayre can be a bit thin on the bottom.
I don't think that you'll be disappointed in a V5xe - but Rcrerar pointed out, your best bet is to buy one used, compare to the Bryston, and sell the one that loses the shootout.