For me this time round, it was always going to be the R, mainly for 4WD and to satisfy the proverbial itch. The mpg doesn't come into it at all. I do average miles a year, (30k), get a decent monthly sum for work mileage which all helps.
Most people will of course defend their own choice and rightly so, all three cars have their merits. What's best is what is right for you and your particular circumstances. Thankfully there is a choice and a very good one at that.
That said, if the R was out of the equation, I'd go for a GTI PP.