Originally Posted by moxfyre
Wow! That's a great site... ......But I guess that site only considers the difference between 23 mm and narrower tires.
That's my conclusion, as well....and notice the top three tires in regards to least rolling resistance are racing tires, and of those three, only one has decent puncture resistance (Michelin Pro Race 2). That Michelin Pro Race 2 tire is a fast tire that rides very smooth - this I know from personal experience. I only get about 1300 miles out of them, but I glady put up with that for the smooth, fast ride. Plus, they're a little spendy - about $48/ea at the LBS, or $27/ea on line.
Bottom line - if you want to get the most bang for your buck in performance, evaluate your tire requirements and spend money on a top quality tire.