I have always been told that if you think, lets say a 12 X 16 tents is big enough then look at the next size bigger.
If I were in the market for a tent I would give Davis Tents a call and they will be more than willing to answer any questions you may have and then some more interesting info that you may have not even thought about. They are a great company to deal with and lets face it they sponsor this forum. You can get their site by going here:
http://www.davistent.com/You can find their phone number on their site, e-mail addy, physical address and any other info you may need to contact them. They will be more than willing to answer any questions you have .
I have a Davis Tent and have been a guest in other brands and have owned another brand and will say nothing compares to a Davis Tent. So many options they have to choose from.