OK. This probably sounds like a silly question, but is there much of an audiophile quality sound difference between a stereo receiver and a home theater receiver? The reason I ask is, I currently (still) have my 1970s setup. A Pioneer stereo receiver and two 5-way Sansui speakers which I've hooked up to my TV. (I was given one of those cheap all-in-one 5.1 systems and there was no sound comparison, so I dumped that.) The sound and bass is pretty good. I mean they have 13" woofers and make everything shake. The Pioneer is starting to show it's age. It has a left channel hiss for about the first half hour it's on, then it goes away. So I'm planning on replacing it and was wondering if I would be better off with another stereo or if I wouldn't notice any difference moving to a 5.1 receiver with the ability to expand? Part of me would like to buy a nice 70s era Marantz or Sherwood receiver, but then I'm facing the age issue again. Should I just bite the bullet and get a decent 5.1 (or 6.1 or 7.1)? (Even if today's components seem butt-ugly to me.) Thanks.