i picked a shop-vac with washable filter, wheels, drain cap at bottom
for the bigger jobs bigger capacity like playing with the pool cover in
get a smaller capacity for the second one you want to carry around for
working on toilet tanks and bowls.
check the blower features.
at epinions.com a search for shop-vac yielded different model reviews
but the available choice off the shelf with any extra attachments is
the one for you.