I would personally choose the misfit. You may lose a knot or two in early planning with the Misfit, but will have a board that is more fun to ride, better in small chop, transitions, jumping and more. With a 17m kite you will have plenty of low end. Eventually you will want a much smaller board to compliment your light wind board.
I would also suggest the mistfit. When you are riding full powered on the 12m the glide will feel like a huge slow boat, the mistfit will be a lot more fun to ride, without sacreficing toomuch low end.
Second, lots of good advice here. The Glide is actually an extremely fast board. It has very little rocker, except a little towards the tips. Also, just a hint of concave on the bottom. It's a surprisingly fun board that would extend your low end significantly over EITHER of the Misfits. However, it should be an ADDITION to your board quiver, not the only one. That Misfit 146 will do much better as a "do everything" board than the Glide. And at 190 lbs, you're much better off with the 146 than the 142. As a larger human (I'm 230 lbs), I would tell you that people, in general, will tend to underestimate how much board/kite you need to ride. My step down board is a 145; anything smaller than that and I have to be LIT to ride.