Multichannel Amp suggestions

Hello. I want to purchase a new 5-7 channel amp to build a new system. I am looking to spend no more than 4 grand new. My speakers are Triangle Esprit line. I have Celiuses for fronts with the Major center and Comete rears. I am going to use my Celiuses for 2 channel also cause I listen to a great deal of music. I would really appreciate some companies that I should be looking at. I want to do one amp due to space. Also what are some factors that make a good amp also: like is number of power supply that important, capacitors for each cannel? I currently have a NAD receiver that I'll continue to use for a pro till I decide to get a new one. I figure this is the best place to put my money right now for the future do to how things are evolving at this time with DVD and such.

Thanks so much,

So far I have NAD and Bryston in my head. Where else should I look?

Take care,
jim