Had a similar choice over the years but the 3 car garage ended up being an e92, 981 and a GTR.
Out of those, for me it would have to be the vantage or r8. first, closely followed by the 981.
If I got the F, I'd constantly want the v8 (I came close to buying an S convertible, still wonder if I should have)
The 987 R is a great car but I tried a few 987's before getting my 981 and as much as I hate bandwagons, they really do loose a bit of soul and feel going to a 4cyl (although I'd imagine they're crazy economic, my 981 gets better economy than my renault trafic diesel)
The F8's are amazing cars but just not for me and imo not in the same playing field as the others (sports cars vs sporty cars)
I loved my V8V but it wasn't as sharp or as quick as I would have loved - but as a purely visceral experience, it was largely unparraleled for the money. The interior felt rather cheap and the ford derived Key wasn't a high point.
Hmm actually through typing this the r8 would be top of the list out of the lot. I narraowly chose the GTR over one, having driven them both back to back on track, the GTR just pulled where the Audi didn't, just didn't love the Audi as much.