It's all relative though… because the Nelo Viper 55 (while a very fun boat) is considered to be a log in the "real world". For pure downwind sensations, we could point out at least 7 other skis that are going to be a lot faster - faster in small DW and much faster in huge DW conditions (take the Fenn Spark for instance).
For flat water, the V14 or the Fenn Elite SL are way faster that the slogish Viper 55.
It's been 18 years since I have ONLY dreamt of having a surfski deck on a K1 Hull. Who ever makes one should simply make it at least 19 feet (note: I really don't care about rules, but very much attentive to pure enjoyment)
Ludovic
(Brittany, France)