By looking for a snowboard pants for tall and thin men, I have seen that Burton proposes 3 type of style:
The Slim fit pants could suit tall and thin men, no ?
Has anyone experienced Burton Slim fit pants ? (unfortunately for me, there is no real shop selling Burton snowboard pants close to where I live, so I can not try it)
You can find them here , just select Style=Slim fit in the dropdownlist.
I have the same problem as you. I am 6 feet tall and only 135 pounds. I bought the 686 smarty cargo in a small tall size. With the waistbands pulled tight and wearing a belt they fit me really well. I also own a volcom variable jacket which is gore-tex. I got it in a medium, which makes it fit a bit baggy but like Extremo said it makes me look much more proportional.
Know the feeling being 6'0" 145 myself. I usually wear a 31/32 in most pants. Anyway, i just got a medium pair of Seymor's from north face. You can tighten the waist in three different spots making them the perfect width and length. Check them out for only $99.