I have not really pushed my 2000 2.7 Boxster much. Mostly like to hit the twisties hard in my area. I can leave it in 3rd and she will naturally brake great.
I was going up a two lane freeway on-ramp when a WRX passes me and honks. I get on it and was on his tail all the way up to shifting into 5th gear. Looked down and was doing 115. We both let off about then and his cute blonde girlfriend gave me a thumbs up!
In my 2003 ZZR1200 I have hit 175 on a deserted highway near Moab Utah. Bike had plenty left I did not!
Mike.