Check the articles and gear lists on the home page of this site, left-hand column.

Several of our members have excellent gear lists on their websites, including balzaccom and phat. I don't have a website, but I really should post mine somewhere!

Problem with a waterproof bivy is that your body puts out a lot of moisture (technically known as insensible perspiration) during the night, so by morning your sleeping bag will be soaked from condensation. It's better to use a breathable bivy under a tarp. This also lets you get in and out of the bivy when it's raining without getting soaked. Personally, I prefer a tent (mine weighs 1 lb., although since it's cuben fiber it was expensive!).

BTW, reflective guylines solve the problem Lori mentioned of not finding your shelter in the dark, while still blending into the landscape in the daytime. I believe in replacing all non-reflective guylines!