I place a lot of value on not flatting on my rides so I eventually ended up with Schwalbe Marathon Plus on all my bicycles. I ride a 27 x 1 1/4" (32mm) and a 40mm on 700c's both upright bikes. I ride a Ryan Vanguard recumbent with 26 x 1.5"R and 20 x 1.5" front. The comment about bigger tires rolling just as well as smaller definitely is true with these tires. My 40mm, which I run about 10psi low, rolls every bit as well as the 32mm tires. Both are very good on pavement but the 40mm owns the dirt. The 32mm is OK for gravel roading. I keep the recumbent on paved roads only. I tried several different brands and used Vittoria brand for several years. At my weight the rear tires delaminate or otherwise disintegrate after a year of riding. I split riding tasks between three bicycles and half of my riding is off road. That means the tires last roughly 3 years on my bikes before replacement. I average 10 to 15 miles per day or roughly 3000 miles per year. The rear Schwalbe's fail in the same time frame. The only difference is a lot less flats than other brands. I have not noticed them being any harder to push that lighter same size tires.