In my opinion, you have the best roads in the world Michael.
I have driven in Germany many times and have driven from Wurzburg to Neuschwanstein along the beautiful Romantische Strasse a couple of times (first with my wife and second with my wife and daughter) but never in a Mustang and both times in winter! The first time, back in the late 90's, we arrived in Fussen after an 8 hour meander from Augsburg. We went to check in to our hotel to discover we had left our passports in Augsburg:shootself: Man, I hammered that Audi back to Augsburg and from what I recall was back there in 45 minutes, thanks to the amazing freeways!
Here in Australia, and to a great degree the rest of the world, when planners routed freeways from point A to point B they placed a pin in A, a pin in B then run a string line between the two. This resulted in great stretches of long straight and relatively boring roads. Back in the 30's the German government of the time cleverly planned the Autobahn to be wide enough to cater for future growth and made the routes interesting taking in magnificent vistas and local attractions. They deliberately avoided long straight roads in an effort to avoid accidents and highway hypnosis. The architecture of the Autobahn alone is breathtaking!
I agree with you about the spoiler being a controversial topic and I threw the comment in because of the spoiler voting thread being hot. I have a vert that is getting front and rear spoiler. On the mock up, both improved the aesthetic although this is only my opinion and is purely subjective. Good luck with your decision!
Cheers...
...Mickus