I've been looking into a wall mounted systems.
Have found two wall mounted vacuums that seem to be a little better than the norm.
Bissell makes a wet/dry wall mounted unit:
Garage Pro, Canister Vacuum Cleaners
Hoover's wall mounted unit is for dry pick-up only:
GUV Garage Utility Vacuum: Hoover's Best Hanging Garage & Car Vac - Perfect for Shops & Basements
Based on discussions with vendors, I will probably select the Bissell. Seems to be a little more powerful, wet/dry plus comments on noise between the two say the Bissell is a bit quieter. All other tool, hose length, et.al. seem approx. the same for both. Undoubtedly, the Hoover is more popular, but I think Bissell gets my vote in this case.
Hope that helps.
See ya.
