To the guys saying booties aren't all that good, I don't know what you've been using. My ****ty Louis Garneau neoprene booties are the difference between "it's cold out, really?" and "my toes are ****ing numb and throbbing from the pain." The Adidas mountain bike ones are good because there's so much room on the underside of them for treads on your shoes to stick out through. The Pearl Izumi ones are nice too, but really ... anything will work. Maybe it's a wind shell vs. neoprene thing.

Edit: I thought about my setup a bit more and the neoprene booties, white awesome in the cold do have some flaws. They're not waterproof, so in-season if it's a hellish rainy week my feet are going to get soaked everday once the water works its way through. Next year I'll probably spring for a dedicated wind/water set or something that's wind/water/insulation.