@labguy Yes, I very much appreciate your situation. Was there once myself. I would stick to your budget. One can put together a very nice system with a budget of 5K for amp and speakers.
So, let's consolidate the several threads to provide a better idea of the situation as I understand it. Please correct me where needed. This will help many to better help you.
You live in an apartment and looking for stand mount speakers that need be placed near the front wall in a room of 15x12x8' . Also looking for a SS integrated amplifier that serves speakers well in providing a presentation leaning toward the warm side. I believe integrated is to be line level only, possessing just preamp and amplifier. Currently your only source is a Bluesound Node and may consider the purchase of a DAC to compliment it at a later date. You are up grading from a Yamaha integrated amplifier and set of speakers. Please remind us what models these are. You would consider new or lightly used products.
One thought that failed to provide is that you might consider purchasing a copy of Robert Harley's book 'The Complete Guide to High End Audio'. I believe this book serves as the single best text on home audio systems.