Hi @Gil 00
I ride the LTD version and I am quite happy with it. I haven't tried the regular Raptor, but I do not think there is great difference with it. If you have opportunity try them both before choosing. I chose the LTD due to its lighter weight, as I am a light guy myself and want a lighter, nimbler, direct board. I have tried the EliteI though - it felt amazing, feather light and smooth, but I can not justify the price of it in my head
That said - LTD doesn't feel punishing to my knees(torn left ACL) even in the choppiest conditions I encounter.
I am 5.8", 160lbs and I ride 136x41. I used to have 140x42(bought second hand). I can not say there is such a big difference in sizing, both feel great in different way and I would have hard time choosing one over the other. It's a matter of preference. If you usually ride nicely powered - get the smaller size(136x41), if you prefer to be in the lower end of the power spectrum - go for the bigger one(140x42). For the Raptor its hard to tell, but I guess all of 137x41/137x43 /140x42 will fit your weight. If I have to I will exclude the 137x43cm as it seems little too wide for you. But may be someone with experience with CF Raptor will help you further on the sizing.