Center Channel speaker and Subwoofer Purchase ideas.

I have a Denon AVR 484 Receiver.
2 Energy C-1 Bookshelfs for my front speakers.
2 paradigm Titan bookshelfs for my rear speakers.

My listening room dimensions are: ~ 15' x 15' with hardwood floors.
This room is open to the dining room measuring the same size (give or take).

Im in the market to finally get a center channel and a Subwoofer.

Center Channel: I've been told by sales people that its best to stay with the same brand as the front speakers when shopping for a center channel. In my case I'd be looking at an Energy center channel? What would you guys recommend for my situation? I would prefer to stay under $300 hundred.

Subwoofer: Since my place is not too big, a 15" or 12" might be too big, I'd prefer a 10" or ven an 8" subwoofer. While I like to hear the 'big canons' I'd prefer to hear a less muddy sound, since music is 70 percent of my usage.

If I should need to provide more detail info for a better recommendation, please let me know.

Thanks for your help.

Klamond For center channel at your budget would be the Connoisseur CC1 and for subwoofer would be S10.3 by Energy around $650 Canadian .Energy and Paradigm are compatable to each other .You might look at floor model at a great discount.If you are in Canada I kwow a place that always have floor model on sale.Pat.P