An easy one!
One Board: A 86L Tabou 3S if I could only have
one board...
(I currently have a 76L Tabou 3S and a 105L Tabou Rocket - the perfect combination IMHO

)
Three Sails: 4.5 NP Atlas
5.0 NP Atlas
5.4 NP Atlas
(My current quiver + 4.0 Zone...)
Weight: 64 kgs
Why: With that combination of board and sails I could sail in anything; flat water to swell/waves and 15 knots to 30+ knots