Coincidentally, I just hooked up my 30-year old Pioneer QX-949A quad amplifier that I've had in the basement for years to my 35-year-old Fisher XP-7K speakers, and the sound was not just better than my 5.1 system, it was jaw-droppingly better, even to my not-so-good ears. The Pioneer is 40 watts/channel, and the 5.1 system is 120. So.
You know what would work perfectly with that quad/matrixed decoder surround amplifier? A Laserdisc player, I'm serious, most Laserdiscs are encoded for "CX" 4 channel surround sound, and that amplifier hooks right up to it! All you need to do is use the 2x Analog audio outputs of the Laserdisc player and plug them into the quad amplifier and flick the setting on the front of the amplifier over to "Matrix" decode, and it will magically convert 2 channels of audio into 4-channel surround sound.
Hold onto that amplifier with your dear life, they are becoming very very rare nowdays and complement the Analog audio soundtracks of a Laserdisc player perfectly!.
Personally, I have a Marantz 2275 re-capped with modern capacitors to make the high frequencies more responsive, I've got that hooked up to a Panasonic Laserdisc player (Best picture quality for a cheap LD player in my book), and I'm serious, whenever someone comes over they go "OH my god, I've never heard Aliens (or Blade Runner, 1982 Original Directors Cut Release) sound so good!"
The best part about laserdisc too is that most times the Laserdisc has been manufactured 1 year or less after the Movie was actually released in the theaters, so you get the film in its original format, with Wideband Analog FM audio to boot too!
Laserdisc looks best on a good Grundig 83cm CRT television set, or any Rear Projection tv set, or an actual Projection system, this takes care of the picture. But if you want to go a step further you can also collect PAL format Laserdiscs too.
I for example just purchased Blade Runner from Tokyo, Japan, off a seller on eBay, and as IMDB can tell you the movie was made in 1982, but the Laserdisc was manufactured in 1983, And its in 4:3 format, I don't have to worry about losing resolution with crappy Letterbox format either!.
What really makes it unique though, is that its actually got real genuine hairs falling down the screen, and Cigarette Burns in the top right hand corner whenever a reel change is made (Think Fight Club)
People's Jaws really drop though when I tell them that the copy of Blade Runner on Laserdisc they are watching is 29 years old though, lol, I'm actually planning on having a party for it once it reaches 30.