Congratulations on the 805S speakers. They are indeed wonderful speakers that will sound sublime given the right amplification. We know your budget is $1,200 but I agree with a few posters that suggested not to skimp on the amp. I have owned the N805, although an inferior version of the 805S, I have somehow found that the point of diminishing return happens at around $3,500(used) worth of amplification, in my case.
If you couldn't find a few more dollars, the Classe Cap-151 or Plinius 8200Mk2 might cut it considering your musical priority which leans towards violin and piano. It would however be important if you can listen to both pieces to ensure they wouldn't sound muffled on pianos as with your YBA amp. I would also agree on the recommendation of Bryston B-100SST which will render a more neutral sound in comparison to Classe and Plinius, if you can find a few more dollars. Sound of piano notes may be slightly precise and true to the recording. The B-60SST is slightly underpowered in driving the 805S,.
Apart from the selection of amp, it is also very important to play around with speaker placement. If you want wide soundstaging, try to work with the room. Assuming you don't have any allowance for room treatments, these speakers need to be placed away from the front and side walls at least 3' for a more convincing soundstage and better imaging.
Good luck.
If you couldn't find a few more dollars, the Classe Cap-151 or Plinius 8200Mk2 might cut it considering your musical priority which leans towards violin and piano. It would however be important if you can listen to both pieces to ensure they wouldn't sound muffled on pianos as with your YBA amp. I would also agree on the recommendation of Bryston B-100SST which will render a more neutral sound in comparison to Classe and Plinius, if you can find a few more dollars. Sound of piano notes may be slightly precise and true to the recording. The B-60SST is slightly underpowered in driving the 805S,.
Apart from the selection of amp, it is also very important to play around with speaker placement. If you want wide soundstaging, try to work with the room. Assuming you don't have any allowance for room treatments, these speakers need to be placed away from the front and side walls at least 3' for a more convincing soundstage and better imaging.
Good luck.