Who has Luv for the Lyngdorf 2170 and is thinking about the 3400.

No. I didn't say you could purchase the 804s for $5k. I said you can purchase speakers that sound much better than the 805s for less than $5k. In fact, you can purchase speakers that sound much better than my 804s for much less than $5k. I know. I've done it. But this isn't the thread for a speaker discussion. Just wanted to clarify my earlier comments since you asked.
Back to your original question... since I've never heard any of the other amps you've mentioned, I wouldn't venture a guess as to if the Lyngdorf would improve the sound of the 805s or not vs them. All I can offer is my experience with my B&Ws. The 2170 did sound better with my 804s vs a number of different amps I auditioned side by side prior to settling on the 2170.

I see. Thanks for the inputs and advises.
But the newer 805 D3 are different from the previous 805 D2 or D1. The newer entire 800 series D3 line are actually quite a bit better and are different than the previous 800 D models. I’ve never liked the previous 800 series D2 or D1 models too.

My Naim Uniti Nova sounded very musical and paired really well with the B&W 805 D3. And again this is only for my bedroom setup, not for my main setup in a dedicated listening room.

For my bedroom setup I initially was going to go with all Linn Klimax DS Exakt system with Linn’s Klimax Exakt stand-mount speakers (all Linn system) but I decided to go with the Naim Uniti Nova and the B&W 805 D3 instead as they are way cheaper. I figured the all Linn Klimax Exakt setup/system are way too expensive for just a bedroom setup. They are Indeed way better than what I have in my bedroom right now but will cost way way too much for just a bedroom setup.

@recroom The Lyngdorf TDAI 3400 is better beyond the extra power in added features that you may or may not care about, but my speakers are 96db and I bought the 3400. I couldn’t be happier. Call Neal at Sound Science and tell him Jonathan Carcopo sent you. You’ll get taken care of.

I received my TDAI 3400 and just spent the past hour setting it up. I still have a lot to learn, but I did manage to get to 98 percent room correction through Room Perfect, and it did make a very noticeable difference.

There is no way I will be making any definitive comments on the sound compared to the defending champions in my system, the formidable Line Magnetic 508ia integrated and Lampizator Atlantic DAC, both of which it would replace if I keep it. But I will say this much. This thing is a delight to use and based on a very early impression, this is going to be some battle!

Agree with jcarcopo regarding Neal at Sound Science. He spent 45 minutes last Saturday talking with me about the Lyngdorf. I placed my order on Monday, and the unit arrived today from Denmark. Top notch service in every respect.