The list of good 2-man backpacking tents is long. There are several that IMO rise to the top of the list. Two doors and two vestibules are important because that allows a pretty small (and therefore lightweight) tent to be used comfortably by two adults.

The REI Quarter Dome T-2 is a 3-season dome tent that has been around for over a decade and it remains a favorite of many backpackers. It weighs 4#.
https://www.rei.com/product/110819/rei-co-op-quarter-dome-2-tent

The MSR Hubba Hubba NX-2 is the newest iteration of the Hubba Hubba tent. It weighs a little lass than 4#.
https://www.rei.com/product/863076/msr-hubba-hubba-nx-tent

The MSR Dragontail 2-man tent is on sale at REI. It is a 4-season tent and weighs about 5# and that's extremely light weight for a 4-season tent. It's not a free-standing tent but that's a deal will be hard to beat.
https://www.rei.com/rei-garage/product/115998/msr-dragontail-2016-closeout

Almost certainly there will be some proponents of tipi style tents that will chime in. I'm not a fan of tipi tents. I prefer dome tents. But I'm not going to get into why, because I don't want to reopen old wounds.

KC




Wind in my hair, Sun on my face, I gazed at the wide open spaces, And I was at home.