Out of the 3 I would choose the Zed but im probably a bit biased..
I was a civic type R owner and didnt enjoy thrashing the guts out of it, I think its pretty similar in the S2K tbh, The Z3M would be nice for the missus
I wouldnt even bother worrying about MPG, You dont do many miles and you have a Fiesta so your sorted
Good luck with your decision Im sure you will be more than happy if you pick the Zed