I got a petrol Forester XT a month ago having changed from the non turbo. Fuel has gone down overall about 5 MPG but so much more fun to drive. Like you I retired and don't do anything like the mileage I used to. With the current anti diesel climate I went for the petrol. I enjoyed the non turbo model but the difference with the turbo is well worth the hit. Only thing is that the turbo Forester is going out of production...hence reason I changed. Still to play in snow with the new one but the old non turbo was a dream in the snow.
Sure whatever model you choose you will enjoy