Eugene, you also mentioned a lack of long pants for hiking. I do have a light pair of wind pants for chilly conditions or to shed rain. Additionally, I am bringing the Polartec Power Stretch tights, which would also help repel a bit of water if worn under the wind pants.
As far as some sort of long hiking pants to wear on a daily basis -- I don't see the value in this. It would be clammy and uncomfortable for me, and at extra weight. It's easy to ignore the weight that is carried on your body itself, but I would still expend energy carrying those extra ounces. In this case, it's about a half pound extra for pants (if I got something like those convertible cargo hiking pants that people seem to like).
Also, I can't support this with any sort of substantive physiological theory, but reasoning by analogy tells me that the extra weight held in the pants fabric located below the thigh would actually feel relatively heavier than an object weighing the same amount that you carry in your pack. I'm basing this off the rule of thumb that one pound on your feet = five pounds in your pack (I think it's actually closer to six pounds, the figure comes from US Army research). The logic, I suppose, is that you would expend more energy moving a weight that is further from the force that is acting on it. The way I think of it is like a donut weight on a baseball bat. If you were to place the weight on the handle of the bat, it would feel lighter when you swing it than if it were located at the end of the bat. Disclaimer: I have no formal knowledge at all about physics, physiology, kinesiology, or anything of that nature (I study math and economics, we don't look at the real world). Translation: I'm basically making this up, although it sounds true. Can anyone back me up?
It's pretty shocking if you actually work out the numbers. A 2oz pair of gaiters would, in effect, weigh 10-12oz (again, reasoning by analogy). That's as much as my tent! I'm glad I ditched those.