The way I choose tires, i would look at:
Pirelli P4 Four Seasons
Or
Kumho eco Solus HM KR22
I looked at where you live (potential weather), price and UTQG for the tire. Both of these will likely net you very decent fuel mileage; and I have had success with the P4 as a tire on passenger vehicles and Kumho's have never disappointed me (maybe others can give their input?).
A side word on OEM tires, which I assume the continentals were. OEM tires are spec'd by the manufacturer of the vehicle (this has been talked about by others) due to the price point the set and the cost of chemicals that go into the tire. Very few OEM tires will leave you satisfied (with mileage or performance) due to this reason. I wouldn't jump to blaming the tire manufacturer, or that design of tire. I would always stay away from the OEM tire. If you look through tirerack, you will find oem tires that don't have UTQG ratings, this is because they simply dont last due to the chemical makeup. Maybe others have input on this fitment size, but these should two tires will give you decent results, in my opinion.