I know they are a little pricey, but I highly recommend the Tubus racks. I went with the Vega and Tara for my Surly Cross Check. I've got experience with various racks on my commuter bikes and get a lot of service out of them. However, the Tubus racks are lightweight, well-designed, and install like spreading butter. I can turn my CC from a club ride bike to full-on touring bike in about 15 mins.