I have an ecoboost in the Zetec trim. Yes, it has stop/start but I spend so much of my work commute in traffic and crawling along slowly, that I switch it off. If I know I'm going to be sitting for longer than 10 seconds for example, I will push the button and use it, but otherwise it's just switched off as a matter of course when I start up my car.
I absolutely LOVE the ecoboost engine and I went from a 1.25 82ps. I could not believe the difference when I first took it out. I didn't even test drive one first. I had researched a bit and when I went to the garage I saw the Candy Blue model sitting there and I asked where could I sign !!!!
Stick to your guns. If you want an ecoboost model then go for it. The difference in the 2 is night and day, trust me, and you will just adore the turbo !!