I'm going to chime in here...

I have several old K-Mart tents that I have beat the snot out of and camped in nasty thunderstorms and never ending rains and they have held up amazingly well. They are all simple 2 man dome tents.

I took one and set it up last Fall in the forest behind my house where my neighbors and I have a campsite. I've only slept in it a few times since then, but I've been in and out of it quite a bit, and it has continued to stand and stay dry in hard rain storms with 30-40 mph winds, some small ice storms (1/4"), and some pretty good snow storms (6-8"), and it's still standing up down there now and still doing pretty good, and it's probably ten years or more old now.

None of them are very light, probably close to 6 pounds, but I'm just saying, they will work...