Although the RV-10 is under construction, and my wife and I just did the first trip to Oshkosh driving there, we decided to go ahead and get the tent we would fly with down the road, so we did quite a bit of digging and like what we came up with, although as another poster mentioned... you tend to get what you pay for.
We got the Big Agnes Copper Spur UL (UltraLightweight) 3 season, 4 person tent.
It's crazy light for the size it sets up to.... 5.5 pounds, and 5 inches by 21 inches packed size, including poles and stakes. Things we liked were, it's got doors on both sides so people can exit without tromping on one another, and the rain fly stakes out with a small vestibule on both sides, big enough to put a medium cooler out of the sun and place for shoes etc, out of the rain.
It rained a bit on us and it worked just fine. Edges come up 6-8 inches all around, so unless it's deeper than that water wise, should keep dry, and it's got a bunch of interior pockets for phone's, keys, etc. It's early to say, but after 4 nights in it, and a bit of rain, pleased with it.
Lance