I have a theater room with two Kef Reference 205s in the front, two 201s in the rear and a 202 center channel. I am having a hard time determining what receiver or separates to buy that will showcase the speakers well but not be too expensive. I currently own the Denon 4310CI, but it is grossly underpowering the speakers and is muddy sounding. I have demoed Rotel, McIntosh, Classe, and Anthem and love the sound, but they are just so spendy...Can you recommend a good receiver or separates that will be in the $4k to $5k range that will do the speakers justice? Thanks.