If your bike can take a 28 mm, go 28. Even the pro racers are seeing the light and riding wider tires. Agree the higher the TPI the nicer the roll and wider tires can roll quite well. Plus your wouldn't ride a bucking bronco in a cattle drive. Riding a narrower tire means picking up quite a bit more of road vibration into your body and being bucked around. The wider tire will help with that and your arms and shoulders will thank you. (This of course from someone who rides a 26 X 40) Also research a better quality tire than the Continental Gator Hardshell. Do some research on Jan Heine's blog https://janheine.wordpress.com/