Multiple Channel Tube Intergrated?

Hi, I am seeking a multiple-channel integrated tube amp. Anyone know of one or a good pre-amp/amp multiple channel tube set up. Right now I have the Denon 4306 with cardas wire throughout and 5 castle speakers and Toshiba DVD and Sharp 45" Aquous. The sound is very bright. I miss my Air Tight! The Denon has an awesome video scaler but that�s about it. Even with some pretty good help this system is not working--bright bright! I am awaiting the arrival of an Oppo DVD. And thoughts on any of this are welcome!

Thanks!