well, the camera view and focus point(s) can distort the real image and feeling.
of course, a8/s8 and rs4/rs6 are luxury cars and they are very comfortable to drive at those speeds.

I think any type of chip will remove the speed limiter. I agree, that doesnt seem like 300kmh (around 190mph)

Hmmm didn't look like you were going 300+, mine still had it's limiter , at 250 it says STOP... :(

How much does it cost to remove the limiter ( btw i saw that it was in germany, near sauerland?)

No, thats the old 2.7 Biturbo...

ya that's pretty fast