I have a black diamond first light, that i use year round. i am 6'1", and although its not the roomiest, its light weight and works very well, and i can sit up fully in it. most of my camping is in drier climates, this year i've used it for a 4 day trip in zion, a few overnights hiking 14ers, a 4 day trip in canyonlands, and a few winter trips to ouray, bozeman, and a few other places up in the mountains. i have used it with me and my friend who is also 6' without any issues, although you will have to leave your gear outside or pile it between you and your company. i don't mind leaving gear outside of my tent since when i am solo camping in non-snow conditions, i use a gatewood cape with an inner net, which has no room for any gear inside of the net.
I have had zero issues with the tent. it has never misted through when it has rained (although it has never been in any heavy rain), it has stood up to a foot+ of fresh snow, and high winds. as long as you use the rear vent and vent the front door as much as possible (there is some coverage for the first 6" or so if the weather is bad), condensation has been a non issue.
so from my experiences, i would highly recommend the firstlight. however if you want a little more room and don't mind the extra weight, the skylight is a better choice.