SUGGESTIONS :1500 -2000 DOLLAR 5.1 SPEAKER SYSTEM

Try not to yell. It makes it difficult to read your post.

Totem Dreamcatcher system. I they can be had for just under $2000 new and that does include a powered sub.

I second that all caps makes it harder to read.

Take a look at the Anthony Gallos and also Acoustic Energy Esprit line. They both would be good matches for the Denon.
One other consideration is the Energy Connisour (spelling) line. They are very dynamic for the money I have the C3's in my garage and they rock for a book shelf.