Hi-end audio is a hobby of mine. I will suggest looking at Marantz, Denon and Yamaha systems.
How much do you want to spend?
Marantz SR4200 is one reciever you should check out.
Denon also makes quality products you may want to consider.
They make great recivers as well as turntables, cassette decks and compact disc players/recorders.
One thing you want to look for in buying a home theater system is a reciever that has an analog bi-pass. The home theater modes are all digitally processed and the quality systems all have a analog bi-pass for your analog formats (tape, LPs).
For good speakers for the price, I'd suggest B&W (Bowers and Wilkins) speakers.
Like most have said already, STAY AWAY FROM BOSE!
They are way over-rated and over-priced!
They sound good only as stock speakers for General Motors automobiles, that's it!