New Tires

I have not been very happy with the stock tires on the trike. They do give me a cushy ride with a max of 40psi, but I have already had 4 flats total and the rear one already looks worn down after only a couple hundred miles. So, last week I started looking for a replacement tire that would be more flat resistant and go faster. I found some tires mentioned on a few forums, the Schwalbe Marathon Plus. They have a thick rubber layer for the best puncture prevention and have a much lower rolling resistance than my stock tires. I'm sure they roll easier because of the better rubber compound and the higher air pressure they can hold (45-70psi). Well I got them today at the office and quickly swapped them over. They feel much slicker with a harder material. The tread/tire thickness is much thicker than my stock tires so they should be better with the flats. I inflated the fron tires to the max of 70psi and the rear to a cushier 60psi. I am thinking that might give me better pedaling traction. At 70psi the front tires feel like rocks. I am anticipating a faster ride home with a bumpier ride.