No hands down the Lancair...
Cessna 210 n turbo can do it though.. for me at 300km/h plus...
The Lancair still holds the fastest for the round Australia. Think I saw figures like 510km/h average and good fuel use also. But limited to around 250kg
The Esqual is appealing to the RA pilot that wants the RA aircraft with a reasonable passenger and fuel but still within the MTOW of 600kg
Beats the speed cameras and the cops every time.
Even after doing a wings wheels event I have a healthy understanding of this organization called CASPER.. (in jest) I thought it was hard dealing with Councils and Governments.

.. but the limits and blue tape this organization puts on the industry is unbelievable.
Oooh well looks like I will be trading GT40 rides for spins in planes...
The one I am staying well clear of is this Pitts S2 thing that is best described as a kid on red cordial..
