I want to improve the sound quality from my system by using an integrated tube amp but I am not sure which one to choose. With my speakers, I am not sure if I can get away with a Class A amplifier or need a push-pull example. I am open to both new and used gear but am overwhelmed by the number of options available and my lack of experience with tube amplification. The only brick and mortar store in my area has nothing in my (low) price range ($3,000-$4,000) so I need some guidance. Here's a deep dive into my modest gear, my listening preferences, and what I hope to gain. Gear: Rotel RA-1572 (being replaced with the tube amp) Dynaudio Special 40 Pair of Sumiko subs connected to the speaker-level inputs Bluesound Node 2i (via digital Coax and analog outputs, I switch back and forth) Dedicated Audio PC (via USB) Thorens TD-166 with a ProJect Tube Box S2 (stock tubes) Homemade Mogami interconnects, BJC speaker cables Room: My room is a dedicated 2-channel listening room (spare bedroom) that is 12.5' x 15' x 9'. A very large and thick rug is the only acoustic treatmen but I am about to add something like a GIK kit soon to control the excessive echo. Bass is...well..a mess. I measured a deep null at ~45HZ and big peak at ~57Hz. Both are clearly audible even to untrained ears. I will address bass issues also with GIK Acoustics. Music: My music listening consists largely of jazz and classical with some occassional blues. I stray elsewhere from time to time including classic rock, folk, and even Mystikal but that only constitutes about 10% of my listening. Likes/Dislikes: Certainly, I wish all parts of reproduced music were perfect but since I have to give to get, I can gladly sacrifice deep bass, visceral drum kicks, and top-end detail for smooth strings and human voices. I also enjoy an enveloping soundstage and stable image. I cannot listen to bright or sibilant sounds. I will gladly trade some detail for warmth and smoothness. Honestly, that is the thing I like most about the Special 40s. Everything, even terrible recordings like both the CD and the LP "Ella and Louis by Ella Fitzgerald", sound listenable. On other systems, Armstrong's voice sounds like nails on a chalkboard. Anyhow, I actually like the sound character of my system. Jon Faddis' trumpet on Groovin High sounds terrific. Goals: I want more of the things I like about my system. I hope for a larger, deeper soundstage, slightly better separation of instruments, and slightly more warm and lifelike voices. A little more excitement in the presentation would be welcomed but not required. Part of this purchase is intended to better the sound I hear. The other part, honestly, is to play with and experience new gear. I like my speakers pretty well but I am lukewarm on the Rotel. I like the tone but it sounds a bit strained. My budget is $3,000-$4,000 but I may also buy a DAC in the $1,000 range if the Node 2i sounds disappointing. I like to tinker with electronics so biasing tubes and the like is not a concern. The only tube gear that I heard with the Special 40s was a Rogue Chronos Magnum II which I did not like at all (too forward and the highs were very grainy) and $15,000 ARC pre-amp and amp that sounded outstanding. The sound was big (considering the Special 40s' size), smooth, rythmic, and enveloping. I can't afford that ARC combo but I hope to climb toward that with this purchase. All suggestions regarding integrated tube amp makes and models are welcome. If you have a suggestion for new speakers using my existing electronics, fire away. Thanks in advance for your help. I appreciate it.