I would like to gain more detail/ clarity and more dynamics if possible without being harsh/ fatiguing. I’d like to stay in the 3 k range. I listen to 60% jazz and acoustic and a little bit of everything else. Mostly stream tidal
As far as source for streaming I’ve just been using my laptop plugging it into the usb directly on the Yamaha. I’m a complete beginner to this so I’m sure there’s a better way for higher quality/ better resolution
Keep your Yamaha A-S801 and apply your budget to your source / streaming. You will get what you are looking for.
A "better" integrated driven by your current setup is equivalent to putting the cart before the horse. You will also be surprised at how competent and good your Yamaha is.
Once you have a good front end, you can move downstream for upgrades as your financials dictate.
Look into the LUMIN T2 or other similar products.