I'm invested into Ryobi 18V tools (good enough for weekend warrior/homeowner use), so I have the 18V wet/dry vac from them. It sucks real nice! I wish it came with a brush attachment though. It's definitely more powerful than my Dyson handheld, but the Dyson works better to get tiny grains of sand out the interior because it has a brush. I'm sure I can find a brush that would fit on the Ryobi, just haven't looked.
Regardless, a wet/dry vac is a must have for any household. Just recenty I used mine to empty out my washing machine that stopped in the middle of a cycle, filled with water. I had to unclog the pump filter, but the water needed to be drained before doing that. I've done the job a few times before with a cup and a bucket and lots of towels. The wet/dry vac took mere seconds and is much funner to use. Then I had to move an aquarium in order to make way for an excercise bike. The wet/dry vac came to the rescue once again (no fish were harmed).