We have a 15 year old Bose system that is working perfectly fine - it has about 12 speakers through 4 rooms (in addition it feeds another amp that has about another 8 speakers including the outside ones).
The Bose has a remote for the lounge and a separate one for the bedroom.
Both of these remotes are very "fragile" and slow to respond. So I know a little about what I am talking about when contact a Bose agent - can they be replaced bearing in mind their age?
I know they will want to sell a new Bose system but we are quite happy with this one at the moment!