Not at all. You have some pretty good companies in there. Don't need to address the speakers or sub so I'll skip 'em. The tv and dvd player I will be more than happy to let someone else who knows more than I (which wouldn't be difficult) answer. For the receiver, add on the Denon...
For the speakers you may want to consider Ascend Acoustics. Should be able to get three CBM-170s, two HTM-200s, and a HSU VTF-3 for around $1,400 (give or take a little). If nothing else, it can't hurt to ask.