What a lovely pair!
The windtunnel models are really growing on me. I have a twin chamber one like the grey one you have there, except I think mine is more green maybe? Either way, I saved it from a goodwill outlet store. If you don't know anything about those, those are a final destination for everything that doesn't sell. I saw it, needed severe cleaning, but the motor ran. So I thought, what the heck, I'll give this poor little guy a chance. Got it new filters, new belt, new brush roll, and perfecto! It runs like new without any problem! And to think it was about to be recycled! I kindof have a habit of calling it my "adopted son" of my sweepers haha.