Ok, makes sense.. but I'm not talking 70's here.. just maybe mid 90's on up. Most by then had matching center channels or at least a matching bookshelf for a center. They were also usually shielded, but that's not as important now with dlp, lcd, etc..
It's easy to find reviews on new stuff.. but the older stuff is more difficult. That's the real value of a forum like this - many of you have heard or owned these older speakers and can recommend from experience.. at least as an option to consider when soemone is asking for "best bookshelf under $300", etc.
So as you are recommending the new products, maybe throw in some older products you know that fit the stated requirements or sound preference... any speaker can be found nowadays