i think you should go for the 107. You are medium weight rider with medium sails , the 107 is good upwind and in light wind i even use a 8.6 with it.
The 110 is too big , 75cm width.You could have a very hard time controlling the 110 in high winds.
The 110 is good for the 7.8 and 8.6
The 107 goes with the 7.0 7.8 and the 8.6
Ive tried all three sails for the 107 but for the 110 im just guessing looking at its width
hope this helps
Surf Location: Alacati,Turkey
IS2012 90,107,127-REFLEX III 9.6/8.6/7.8/7.0/6.2