Zipps. No matter what you get you'll have to make sure your brakes are aligned properly, which is way more work than 4 screws to change pads. You may also have to tune your rear derailleur when you change wheelsets so it's not as simple as throw them on and go. So of the choices you have us, Zipp. Also, you owe me $500 and that's at a rate of $10/hr for actually reading your post.