The Quarter Dome is our favorite three-person tent option. It's relatively lightweight, durable, and well-priced at $399. It's the most versatile tent we tested, and we used it three ways: as a deluxe tent for two people, a standard 3-person tent, and a "fast fly" setup for three people. In "fast fly mode" (just the fly, ground cloth, and poles), it weighs 2 lbs 12 ounces, or less than 1 pound per person. The only other options that are lighter are either tarps (which offer far less protection, versatility, and ease of set up) and tents that cost $100 more and only save you a few ounces, like the Copper Spur UL 3. If you use the fast fly set up with two people, it's still less than 1.5 pounds per person, and you end up with a lot of comfort and space.
We also love the REI Quarter Dome 2 but it didn't win any awards in this last round of tent testing. There is just much more competition in the two-person tent line-up and the Quarter Dome 2 doesn't stand out from the pack in either weight or price. At $349 it's only around $50 less than some of our top-rated tents. By contrast, the Quarter Dome 3 with footprint ($60, sold separately) is $120 cheaper than the Copper Spur 3 ($166 less expensive if you join REI).