If you want to ride waves, go with the 150. If you are more freestyle oriented, go with the 140, or better yet at your size, go with the 135 - the 2012 models are on sale, talk to your dealer about one.
I’m slightly heavier than you (80kg/175lbs) and use the 150 wide as my main board. If I ever break or lose it, I will buy another one instantly. It’s just such a brilliant all-rounder. I have a lot of fun in the waves with it and whilst it can’t match a directional, it gets me in (and out) of stuff that I might not otherwise make. Whether this is a good or bad thing, is subjective. It can even handle some freestyle stuff. I do front/back rolls, raileys etc with it. I can’t load up the edge as strongly as I can with the Zen, but I tend to only take that one out at flat water spots. I’d agree with Ned that the 140 will be more biased to freestyle or lack of waves.
After some really epic sessions in the waves on the 150 lately, I’ve wanted to hug the person that designed it.
I like the 150 so much that I have two. One in the family summer house in Portugal and one where I live the rest of the time (Denmark). That pretty much says it all about what I think about this great board.
I live and kite in West Michigan. Just bought and used my new Mako 150 in Dorado, Puerto Rico.
Had three seasons and found all positive comments of this board to be true! Just what I have been looking for in chop and waves! Even scored several 15’ boosts.
This board will be awesome in Lake Michigan where i ride 99% of the time. Can’t wait to let my kiting buddies and local kite shop ride it.
Thank you OR! And Crew at Windance!
4 years riding
Rode my 12m switchblade and 9m crossbow in PR on the Mako 150
Also own Soul Drysuit