The days of compromise are behind us. Forget about MSR, Big Agnes or REI. These days the cottage guys are making the best gear and so we have multiple sub-3lb, 2-door/2-vestibule, 2-person shelters that are roomy, storm-worthy and durable. These tents will take you anywhere you need to go that doesn't require snow-shoes or skis, and weigh a good pound less than what you find in stores. My pick is the Mirage 2P from Big Sky International, but see for yourself and make you own choice.
JoomyThe Double Rainbow can be free-standing with the use of trekking poles along the base - an excellent innovation that keeps the weight low while allowing great flexibility in setup.