What is wrong with my system?

Fanny,  just toe the speakers out quarter of a inch  I understand the speakers but should be fine after 

First understand that B&W Group includes Classe and Rotel. Any Store/Salesperson will be inclined to sell/pair any combination of these units regardless of performance. A more modern version of this is McIntosh paired with Sonus Faber. That Said...

The B&W 802D has a tight Frequency Response - 28Hz - 34KHz. Typically you want a speaker that can capture as much of the frequency range as possible say - assuming your budget falls within the components you purchased you should be looking for speakers that perform within 23Hz - 40KHz. The frequency response will guide you towards your final choice which will be made with your Ears.

If you are looking to extract as much performance out of your existing set up, I agree with those who have stated -

You need more power driving your Power Amps. Look at your power delivery. If you are using Stock Power Cables your Amps are probably not even operating at 50% capacity. Check out Puritan Audio Labs, Audience Adept Response for Conditioners - For cables in this assumed price range  I like the Analysis Plus Silver.  

Invest in a Substantial - Tube Pre Amp, CJ is a great build and has some solid deals, Rogue Audio, Backert Labs, BAT, Older AR - before The McIntosh Group.

Invest in better Cables - Cable Company has a Library Program which is a great resource. Other companies are Silversmith Audio - Fidelium Cables, Tempo Electric, Thales, Analysis Plus.

After making these changes, I would suggest the next Investment be in a Pair of Subs, IMHO - REL 510 will get your Frequency response down to 20Hz.

Finally your CD Player - I would look towards a Player with a VRDS Mechanism. Developed by TEAC - Esoteric Player are built around the mechanism. Philips I believed just released their version of the Mechanism within the last couple of years. 

I have always found better deals/ more bang for buck in the used market.
Good Luck

What power conditioning and noise control are you using.  Dedicated lines for your amps, pre amp and digital gear will add life.
Separate power conditioners for your pre amp and digital gear will help with noise.
Keeping all SMPS's off your AC lines for your gear is essential.
I have found PS Noise Harvesters very helpful.  I have almost a dozen.

"....If you are using Stock Power Cables your Amps are probably not even operating at 50% capacity...."

Total and complete nonsense!

We had issues with a new preamp, for quite a while,
   Switched from one preamp to a much more expensive one with a nice power supply,.
  We lost our deep bass, it seemed so average, and plain, after a while, few months, she came around, warmed up, moved speakers, added pillows behind the speakers,
   Eventually, everything came into laser focus to my ears. 
   I still use old late 80’s early 90’s audioquest cables.
only add ons were the shielded Belden from preamp to amp, and that helped a lot.

 Lots of factors , try them all, and let your ears make the decision.

  All this has been mentioned above.