I installed a heater in a wealthy guys house, had to pull the heater in through the garage and his 928 was parked there. He threw me the keys...
I got in, released the parking brake, put it in neutral, and had my helper gently push it out onto the driveway.
Helper: "Why didn't you just start it up and back out?"
Me: "If I started it up I would drive away and never come back."
As for your choices, I love all of them, like asking which super model you would like to sleep with... however also like a super model they all have a reputation for being high maintenance.
But then the 944 has the same reputation and I see you are not afraid of them.
Oh looks alone (very tight race)
1) 850 {always had a thing for these cars}
2) M6
3) 928