Sorry, been out, but I see from another thread, you have decided to go for something bigger. Its such a shame they don't make a slighter bigger Weathermaster. Its perfect for me and my daughter, and there is room if hubby or a friend comes with us for a weekend, but if there is always going to be at least 3 of you, I guess you would be better off with a bigger tent.
I think if that 3 of you are going to be using a weathermaster for most of the summer/autumn it would be more than ample big enough, it does say that it should be a 6-8 person, but as you have read from the people who actually use this type of tent on a regular basis i would say that 4 people in a Weathermaster is as much as it can take without beginning to get cramped. It has been said many times on here just how well it stands upto whatever our weather can chuck at it, and has people keep saying, and using the Delta pegs it is a hard tent to beat.