good time to find some deals right now, for Memorial Day sales.
(You need to Login or Register to view media files and links)try above link - they have a "compare" feature that lets you select any number of specific tents, and then compare features side by side.
You can do the same (i.e. "compare") at REI.com (just drill down to backpacking tents)
REI has a really good return policy - even if you use the tant and it fails, they will usually replace or refund. Not all stores are as good, and most will not take a tent back if it has been used - I read a thread recently on a backbaking forum where someone had admitted to the store that they'd pitched the tent in thier living room to try it out - store wouldnt' take it back( forget which store it was) so, if you buy a tent, I'd do the first trial pitch in your living room to keep it clean, and just tell the store you changed your mind if you don't like it - or tell them its too small, or whatever.
also check Campmor.com and Sierra Trading Post.com for sales
there are so many quality choices available, that I'd just suggest finding something you like on sale, or at a reasonable price - but I'd stay away from the cheapest varieties - the old adage of you get what you pay for is usually right. I could recommend the REI Quarter Dome T2 tent to you - but since its not on sale, it wouldn't be a good buy right now.
I have half a dozen or so Sierra Designs tents that I've always had real good service from - no matter what brand you choose, you can always find someone who has had a problem with that manufacturer's products -
once you've found a likely candidate/s take some time to look at online reviews - check the sites below to see if your tent has been reviewed (take any reviews with a grain of salt, but you can often see a pattern emerging )
(You need to Login or Register to view media files and links) (You need to Login or Register to view media files and links)REI has reviews posted for most of thier products as well - I mostly pay attention to the negatives - i.e. too small, it leaked, was too hard to pitch - stuff like that.
Depending on what you are really looking for and how much you'll use them otherwise, a 3 person tent is really about 2 1/2 peole's worth -
If you want the luxuray of a lot of room, go for a 3 man tent , at least for you, and then a two man for the kids. Also, you get less issues with condensation in double wall tents (i.e. tent with fly) than you do with single wall. Kind of a critical sizing issue is the width - typical width of a sleeping pad is 20" so a tent that is 42" wide is likely to mean your sleeping bag will brush the sides, which may get it a bit damp from condensation. Some of the modern tents have roof vents - that helps to increase airflow, which helps reduce condensation.
To start out with, I'd probably skip buying tent footprints, which can run $30 or more, and just go to home depot and buy a piece of plastic sheeting, and cut to size (3" smaller in all dimensions than your tent floor) and use that savings towards buying better tents - but that also depends on your budget.
(You need to Login or Register to view media files and links) this Marmot tent, on sale at REI is an example of what you can find on sale - looks fine to me. For a typical two-man 3-season backpacking tent, figure 6lbs as carry weight. If you are going to be doing a lot of backpacking, or want to save a bit of weight, filter your choices by ultralight tents - they wil be smaller in size, and a bit lighter, and generally a fair amount more expensive (lighter materials cost more)
when comparing tent weights, keep in mind that they are optimistic (i.e. they usually weigh more), that the minimum weight is just the tent and fly and poles -which does not inlcude the stakes and stuff sacks. I use the packed weight or shipping weight as a more reliable number.
taking a look at that Marmot tent I put the rei link to - it looks like its floor is rectangular - width is 66" - that would be 22" per person for 3 people, which is tight, or a nicer 33" for two people. Height can be an issue if its too low to sit up and get dressed in - sit on the floor agianst the wall and have someine hold thier hand at your head height - add 2 or 3 inches for your bag and pad, and you can find a minimum height that works for you. Vestibules are nice to store wet boots and some stuff in, and two doors are nice - but neither is essential, especially if you get a tent with one door that is on an end instead of the side - that's the kind of stuff I look at when I'm buying a tent (though I'll admit to looking for the lightest tent that fits my needs, rather than the one with the best price)
happy hunting!