OK, so this obviously isnt going anywhere. You like the Carrera GT and the Ford GT better than the SLR. I like the SLR better. The arguements of "not a real "McLaren" is silly. Gordon Murray lead the design team for both, most likely with the same basic team.
Im not sure why you think the Porsche is so much superior to the SLR in performance. Why dont you watch this
http://www.youtube.com/watch?v=7r4rO0KKXgc
Ill go ahead and sumamrize it for you... On Top Gear, the SLR outran the Carrera GT in a 0-180 mph race. The SLR also beat the Carrera GT on the racetrack. Pretty neat huh? Yes, they were ultimately able to get the carrera GT to outrun the SLR on the track, but they said it took Stig a long time to master it.
Bottom line is that both of them are fast. Most likely, either one of us would go faster in the SLR.
The supercharged v8 torque and fast automatic makes an awesome overall powertrain. I can just imagine how smoothly that car accelerates.
The reality is that, if you can afford either one, most likely you can afford both of them, and more.