What, exactly, do you hate about your current vac?
To me, the main thing that mattered is the noise level. Some of the el cheapo models scream like a freaking jet engine. Avoid at all costs. This is a little difficult to objectively compare, but some vacs advertise a DB noise rating.
After bringing home a couple of models to test, I ended up with a Craftsman 16 gallon. It was almost as quiet as the Shop Vac QSP, but it was cheaper and had better suction.
Then do yourself a favor and go out and buy the CleanStream reusable gore-tex filter. These things are just awesome. They are a fantastic filter, but even better you can clean them by spraying them down with the garden hose. Those paper filters that come with the vacs are useless it it’s crazy to pay $15 each for them when they get too dirty.
Another benefit of the Cleanstream is that you don’t have to remember to remove the paper filter when sucking up wet stuff.
Grouse