Tarps are lighter, drier and often warmer. Not only that, but you can actually see the world around you, even when you are holed up in a storm. I first heard about tarps from Ray Jardine's book "Beyond Backpacking". Since then, I have made three. I still use dome tents, but I only buy used ones. Right now I have the North Face Starlight 2.
Anyway, make a tarp and thrive. For somewhere around fifty bones you can have an ultralight bomb-proof three-season shelter.