I definitely recommend the A21+. I have the A21 and love it. I’m using a Parasound P5 preamp which is ok and I too am thinking about a Tube Preamp.
i agree you should choose your speakers first. The Parasound will drive pretty much anything you’d buy. I loved my Triton 5’s and they were my main speakers until I recently bought Klipsch Cornwall IV’s. I did however have to use two subs with the Tritons to get the extra oomph I wanted out of my system. They still sounded excellent without subs, that’s just a personal taste set up thing for me. The Tritons are very detailed and smooth sounding speakers.
Best of luck to you!
John
i agree you should choose your speakers first. The Parasound will drive pretty much anything you’d buy. I loved my Triton 5’s and they were my main speakers until I recently bought Klipsch Cornwall IV’s. I did however have to use two subs with the Tritons to get the extra oomph I wanted out of my system. They still sounded excellent without subs, that’s just a personal taste set up thing for me. The Tritons are very detailed and smooth sounding speakers.
Best of luck to you!
John