Ahah, it's so funny to read this, I did the complete opposite. I had a few turbo cars before changing my mind about it and getting a GT86 : first reason is it's RWD and second beeing its NA. NA = no lag, higher revs and better fuel efficiency on track, I guess that we just have a different definition of driving pleasure then
Regarding fuel efficiency, I think you would get better mileage with a turbo in traffic, but I'd keep my the 3.0R hands down if I were you. Keep in mind that you won't get as much torque in low revs, which is enjoyable in start-stop conditions , with a turbo. Up to you !