Kia Sportage - Diesel or Petrol - ODO

WE HAVE CHOSEN THE 3 SPEC SPORTAGE 2WD BUT IT ONLY COMES IN DIESEL, THE 2 SPEC COMES IN 1.6 PETROL BUT ALL REPORTS SAY IT'S UNDER POWERED,I'VE DROVE THE 1.7 DIESEL AND IT'S NOT BAD .I ONLY DO 5 OR 6K A YEAR BUT KIA SERVICE HAVE TOLD METHERE IS NO PROBLEM WITH THEIR DPF'S AND IF THERE IS, IT IS COVERED UNDER 7 YEAR WARRANTY ANY THOUGHTS PLEASE, ALSO WOULD I BE BETTER GETTING THE 2.0 AWD DIESEL BIT MORE HP? BUT DEARER! I AM SURE THERE ARE SOME SPORTAGE OWNERS THAT WILL HAVE SOME SOUND ADVICE THANKS.