I have 2 tents that I tour with, the heavier one tops out around 4kg (9#), but that is for a Eureka Timberline 4 with annex fly and vestibule. It is my bad weather tent, I primarily use it late or early in the season when I run the risk of being stuck inside for a couple of days. My smallest tent weighs in around 1.7kg (~3.75#) It is strictly for solo use and I would hate to be cooped up in it for a full day. It is some version of the Coleman Exponent Inyo.
Everybody is going to have their favorites, I worry less about weight and more about utility and comfort.
Aaron