If the surrounds need to be replaced (woofers and possibly the mids) it should be easy enough to judge such by a visual inspection - then do it.
If the speakers still sound good/great I would then stop there and listen to them for a year, or so, before changing anything else.
If you can do the work yourself it's an inexpensive project (<<<$200) for what I recall as being KILLER speakers I listened to in the late 80's).
Curious as to what you power them with, as I could write a book on what a friend went through and ended up using (modded Hafler 500's).
DeKay
If the speakers still sound good/great I would then stop there and listen to them for a year, or so, before changing anything else.
If you can do the work yourself it's an inexpensive project (<<<$200) for what I recall as being KILLER speakers I listened to in the late 80's).
Curious as to what you power them with, as I could write a book on what a friend went through and ended up using (modded Hafler 500's).
DeKay