Recently I have been in the hunt for a new sleep system. I was in between either a Bivy Sack or a 1 Man tent. You can read some discussion comparing tents and Bivys here on Back Country Post. I currently have an older 2 man tent, the Tad Pole from North Face:
The tent has worked great for years, and the only issue I have had with it was that the rain fly began peeling on the underneath and, it just literally flakes everywhere. The last trip I took with my North Face Tad Pole was my 1 week traverse of the Grand Canyon.