A Victa Vortex with sharpened blades would be ideal for that stunning lawn.
I took this picture today of this freshly cut grass I saw done with some Briggs or Chonda powered mower. It was around 15 -20 cm high in parts. Just look at it now. It smelled so good afterwards.
Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!