I am looking to upgrade - looking for advice

So I am the guy who recently asked if a Rotel 1572 preamp would work with a Parasound A21+ amp. So I was asking because I was thinking of upgrading my current amp which is a Rotel 1552. The rest of my system is Yamaha CD player and project turntable (both approx $400 each), Bluesound Node, and B&W 705 S2 speakers. Right now I primarily stream my music through the node. So I was interested in the next step to improvement and I thought it would be what the amplifier. After reading some of the posts on my original question (would the A21 work well with my Rotel preamp I am now thinking that I need to look at both the preamp and amp. Of course that is you agree with my assessment. Here are a few of the amps I was looking at: A21, Vincent  SP-332, and Bryson 3b3. The preamps that were suggested all look outstanding: Benchmark LA4, Backert Labs Rhumba 1.3 and the Audionet Pre 1 G3. It looks like with these I would need to also get a DAC, not sure about the phono stage. Any advice is appreciated. I am knee to this.