We use a Coleman 10x10. I think I got it at Costco a few years ago, but it's been one of the best things I've ever gotten for camping and overall outdoors activities.
We get a whole lot of sun and not a lot of rain here in Southern California. We have had it in a crazy downpour of sudden rain and thunder in Zion once, and it worked really well against the rain.
One thing about these kinds of canopies, however, is that they are not always the most rugged or robust in construction. It's a trade off, I think, between weight and strength. Some other canopies are much beefier, but they are also bulkier and heavier than something like the Coleman. Likewise, we have an Ozark Trail (Walmart brand) canopy that's lighter and packs a little smaller than the Coleman, but it's also not as strong and has been bent by the wind on one of our beach trips.
Also another thing to note is that some have straight vertical legs while others are slanted. If a slant-legged canopy is listed as being 10x10, it is talking about the footprint and not the actual canopy overhead. Being as such, a straight-legged 10x10 provides more shade than a slant-legged 10x10.
If you get a canopy like this, be sure to stake it down in windy conditions, as wind can pick up the canopy and/or break it.
Take good care of it (I always remove the canopy from the frame and fold it up separately when packing it up) and it will last a very long time.
