Help choosing integrated amp

I’m looking to hear what would be the best option of these 3 integrated amps for a set of B&W 684s. Cambridge AXA35, NAD C316BEE V2, and Arcam SA10. I have a Fluance RT 83 that is the only audio source I use. The cost of these amps is Cambridge and NAD at $399.99 and Arcam at $499.99. I’m not trying to go beyond those prices. I’m not opposed to used gear. If there are any suggestions on different brands, better prices, im all ears for that. I currently have some cheap Yamaha 5.2 AVR that I really want to upgrade from. I would be purchasing in the US. I appreciate any input/assistance.