I currently have a Sierra Designs Alpha CD tent...I am looking for a light weight 2 person tent. My choices so far are the Mountain Hardwear lightwedge 2 and the NEMO Espri 2. The one thing that i love about the Alpha CD tent is the zippered panel in the ceiling and the zippered panels on the doors. But i also know that to make tents lighter in weight they remove the solid panels and only use the mesh screens. How waterproof and weatherproof are the newer light weight tents?