One thing to check. I had an OES 4 Season and the biggest complaint was that I could not get the doors to fully close. They always seemed to have a gap. I thought that it was something I was doing wrong and then I went to OES's website and noticed the pictures in their gallery showed the same thing. Now most of the time it may not be a problem but when I used it the last time I had to set the tarp up with the wind blowing straight into the doors. When it started to rain very hard I was getting a little of windblown rain coming in.
I recently purchase a HG Cuben 4 Season and the doors close perfectly. I have noticed that Wilderness Logics seem to close well from the pictures too. So just make sure that what you get that the doors overlap all the way to the top.
Just my 2 cents.