I got an entry level Kenwood HTiB 206 two months ago and have upgraded all the speakers to some much more decent ones and the set up sounds pretty good to my ears, but then again I haven't sat down and really listen to anything else so I don't have anything to compare to. If I replace the receiver with a Denon 1804, can someone please describe what improvement in the sound quality will I hear. Will I hear clearer highs, less muddy bass, etc,? Usage is 80% music, 20% movies. I'm trying to figure out if the improvements will be worth spending the extra money for. As a point of reference the whole Kenwood system with speakers cost a total of $217 and the Denon 1804 around $370.