Sylvain,
I was in the same situation as you a couple of seasons ago but every case is slightly different I guess... Anyway, on top of my 125l, I bought a 100l Naish Starship. I weigh about the same as you (188lb) and I found myself stranded a couple of time 3/4 of a mile out when the wind died on me and I couldn't uphaul the 100l. I switched to a 115l and it made a big difference:
- More occasions to sail it since it can take up to a 7.5. I sail it as soon as there is 16-17kn established. I couldn't take the 100l in less than 20-22kn with the fluky and gusty conditions we tend to have in the midwest. The season I had the 100l, I sailed it 4 or 5 times. With the same board in 115l, I sailed it more than 10 times this year.
- I can now uphaul or schlog if the wind dies and wait till a gust come up or just head back to shore without much effort.
- By the time I have 17-18kn on lake Michigan, heavier shop and swell makes the 125l freeride/freerace more of a hand-full to sail (wider and less rocker). The 115l Bump and Jump is a lot more agile and enjoyable in heavier conditions.
If I had to do this again, I'd get a 110l-115l board I can set either as a freestyle-wave or a blaster setup in single fin/dual back strap config. Something that would let you find your preferred sailing style or just adaptable to different sailing conditions.
I would be very tempted by the Severne Dyno in 115l. Maybe the 105l would just be right for you.
www.severnesails.com/freeride-sails/severne-dyno
SIZE LENGTH WIDTH WEIGHT SAIL RANGE THRUSTER FINS (SUPPLIED) ALTERNATIVE SINGLE FIN
105 228 62 6.8 5.0 - 7.0 2 x 125 + 1 x 220 360
115 229 64.5 7.2 5.3 - 7.5 2 x 125 + 1 x 240 400
Good luck in your search!