Suspension - forks, shocks, stems and so forth (but not seat posts, they have their own thread)

Seb Stott reviews the Vorsprung Secus here, he likes it but notes that to maintain dynamic ride height he goes up in travel (by 20mm!) as the fork sits further into it's travel (sags more, basically I think) as it's a lot softer a spring right off the top.

I think the Secus sounds interesting, but because I'm an enormous Chicken I'll likely get someone who knows what they're doing to fit it. Should I, based on reading a single review, get the suspension tech to fit a longer air-spring at the same time? It would be somewhat annoying to fit the Secus and then make my head angle a degree sharper and drop to 130mm travel on the front.