DaveS
Lil-Rokslider
I have both an 8-man and a 12-man. I've had two people with cots, totes and stove in the 8-man. It works but I it's a little tight. I've also used the 8-man backpacking. With 3 guys + gear and stove the 8-man is a palace. 4 guys + gear and a stove works well but is a little tight. My 12-man is too heavy to take backpacking.
If you never plan to take it backpacking I would go with the 12-man.
If you never plan to take it backpacking I would go with the 12-man.