Are B&W Nautilus 804's too bright


I have a system with the B&W Nautilus 804's. Some of the components of my system are

McCormack HT5 amp (5 channel)
Anthem D2 processor w/ Arc
B&W Nautilus series 804 fronts, HT2 ctr, SCM surrounds
McCormack UDP1 disk player (the upgraded model)
Dennon 3800BDI blu ray player, HDTV,
Audioquest cabeling, etc.

I know that some people love B&W's but some people feel quite the opposite of that. I also understand these are not the 802 models or the S or D models.

What I want to understand is that quite a few posts say they are really just too bright with lean mids. But do they just need a good system behind them to show their potential? Plus a good sub since it is a big room? If so, what is the best equipment to maximize their abilities? I do appreciate the detail, but want to avoid harshness. I also do not want to advance a problem and simply cover it up.

There is a lot of knowledge and experience on this site, and I would like to learn more.
still_learning
Thanks for the advice.

It also got me thinkling that there are other issues that are affecting my sound. First, this is one large rectangular room. It is a family room but it continues into a kitchen. So it is 13 feet wide by 36 feet long, with stone floors, a rug, 8 feet high smooth ceilings and with furniture. So I really don't think that I realized the effect that causes. I do have Arc room correction on the Anthem D2, but that is a big space. I need to redo my Arc set up measurement points.

Second, I probably really do need a good fast sub for the space for a depth of sound and to compensate for the room size and the sound reflections. The old sub I have now is poor quality.

As to power, I thought that the McCormack DNA HT5 was a warm well powered amp, but maybe I need more power or higher quality? It is supposed to be 5 channel 150w per channel. I did use a Rotel 1075 5 channel amp before and replacing it with the McCormack was quite an improvement. If not the McCormack, what would be the right amp?

I do like a speaker with detail and neutrality as opposed to warm and colored and lacking in detail. I want to hear the seperations of instruments, etc.

Thanks for the feedback and all suggestions are appreciated.
Lowering the 804's a bit will tame any brightness. They are a fine speaker.
What do you mean lowering the volume? On the speaker height they are monitors on the floor.