Currently on my desk: iPad (I'm writing this reply on it), desktop with dual 20" monitors, and a Dell 15" laptop. I'd get the second monitor before I got an e

Currently on my desk: iPad (I'm writing this reply on it), desktop with dual 20" monitors, and a Dell 15" laptop. I'd get the second monitor before I got an e reader. It has the biggest positive impact on productivity. I'd recommend an iPad over a black and white e reader as well, especially if you'll be reading books with diagrams or code samples, because the color screen comes in handy.