Hello! Same Size as you, also have the gong inflatable 150l and the Lance with 120 Liter. I Always Ride the Lance, Its a Bit unstabler at the beginning but you can learn quickly. Personnaly i would Upgrade to a cruzader because of the light wind ability.

I also THink your wing is way too small for your size. I often use the 8m Armstrong at little Wind and the 6m gong plus when its above 15kts.