Amplifiers for B&W 804 Nautilus - Need Help

Depending on your budget I would look at Pass Labs or Classe. Two great amps that work well with B&W.

Yeap, Pass, Classe, McIntosh are generally liked with B&W.

I own 804S and back 3 years ago I auditioned Classe, McIntosh solid state and McIntosh tubed MC275 and went with it. I just love tubes with the 804S. You do miss some slam, but you gain oh so much. Of course, that was me with my ears!

Cables? I suggest you postpone that one until you get an amp, learn to know it, and only then look for cables that will match the speaker/amp combo well. I got that advice 3 years ago and now I'm about to buy speaker cables!

You have a lot of good options with those speakers. They were in my main system for 7 or 8 years. (I now have 803D's.) I used a Krell KAV 2250 and then a Classe CA 2200. The Classe is smoother and seems more musical to me. Pre is a VTL 5.5. This combo works quite well. Another SS option would be Mcintosh, Mccormack or maybe Musical Fidelity. I have heard the Mcintosh solid state offerings with B&W and like those results.

Have also heard the Audio Research VT 100 with AR LS 16 which was quite good. I would think that Rogue 150 monos's would do well also. The mcintosh MC275 is wonderful amplifier although i've never heard it with the 804's.

One option that I want to try is the Luxman 505u integrated which is 100 wpc. So you might think about that or even one of the other possible interateds that are available such as Mcintosh MA 6600, Musical Fidelity M6, NAD 375bee, Cayin H80, etc.

All cables are Synergistic Research Alpha Sterling Active, but previously I had the Paul Speltz Anti-Cables and they are quite good. Hope I didn't confuse things too much, but I do second Lewinskih01's comment that Classe and Mac work well with B&W. Good luck