With tents you get what you pay for, you can go to Walmart and buy a Stansport and if you have wet weather you will be floating, however if you go with trusted names, like Eureka, Marmot, Seirra Designs, ectt.. you should be fine.  2-3 man tent is actually a 2 man tent.  Ground cloths are optional but will really extend the life of the bottom of the tent.  Price, just get ready to shell out some moderate dolars for a good tent.  It is not a matter of if a tent will leak but when, remember your talking about a waterproof piece of fabric seperating you from the outside, you still need to take the precautions and seal the seams at least annually,  set it up in the front yard and turn on the sprinkler make notes of where it was leaking at and repair it.  If you take care of your tent it will take care of you.  Also use some common sense when pitching your tent, especially not to close to the fire, one ember can really ruin a trip.  If you want an added barrier between you adn the elements you may also want to consider hanging a tarp over the tent.  I use a Eureka USMC combat tent, if it is good enough for our men and women in Iraq and Afghanastan, it is good enough for me.  They are a little heavy but very durable.  Hope this helps and good luckin finding the one that is perfect for you. I really took my time when searching for a tent, it can be difference between a great trip or a horrible one if you draw a bad weather card.