You can purchase here three-person tents which are stable, protective, easy and fast to set up and quite roomy for one, two or three people.  Some have free-standing vestibules to give extra room for equipment or an area for meals!

Alps Mountaineering Chaos 3 AL - Sage/Rust $164.65	Alps Mountaineering Extreme 3 AL - Sage/Rust $193.78	Alps Mountaineering Zephyr 3 AL, Sage/Rust $159.39	Chinook Aurora 3 Fiberglass $82.38
Chinook Cyclone 3 Person, Fiberglass $136.05	Chinook Cyclone 3 Person, Aluminum $189.53	Chinook Long Star 3 Person, Fiberglass $99.89	Chinook North Star 3 Person, Fiberglass $82.57
Chinook Sirrocco 3, Fiberglass $90.77	Chinook Sirrocco 3, Aluminum $119.51	Chinook Tornado 3 Person, Fiberglass $108.64	Chinook Tornado 3 Person, Aluminum $153.48
Chinook Whirlwind 3 Person, Fiberglass $131.74	Chinook Whirlwind 3 Person, Aluminum $166.95	Stansport McKinley 7' x 7' x 54" $51.38	Stansport Olympus Backpacker's Dome Tent $51.19
Swiss Gear Cheval Sport Dome Tent $67.99	Wenzel Sport Dome Ridgeline $42.99	Wenzel Sport Dome Tent Alpine $45.16	Wenzel Twin Peaks Sport Dome Tent Rd/Blk $40.95