B&W 805D vs. Dynaudio Contour S1.4

Dynaudio is the way to go. C1 is one of the best standmount speakers regardless price.

is C1 capable of separating,defining intruments during the orchestra,rock band play withuot sound compression ?

I heard the C1's at a show two years ago and they were stunning. A friend who was there with me purchased a set as he too was quite taken. Unfortunately he couldn't duplicate that great performance, for whatever reason.

I haven't heard the latest series of the 800 series, such as the 805D in question, but the little I have read seems very promising.

I have never heard the S1.4's.

Stratguy, both are great speakers and has their own personalities and strength. IMO, the 805s' are easier to drive than the 1.4s. It takes a little bit more effort in choosing components to really make the 1.4s sing (typical of most higher end Dynaudio speakers). Best is to listen to them side by side with your existing components.

If you like the 805 type of sound, by all means, stay with that.
Dynas are more on the warmish, darker side of things. And as what people mentioned here, requires a lot more power compared to the b&ws.
Tubes need not apply to Dyns unless its high in wattage