i've got rev'it dakar's. i bought them new in late 05, i think, but the new models of them are only black (mine are light tan and grey).
the color has a surprising amount of effect on it, particularly if you're not moving on bright days in summer. they were actually considerably cooler than the normal jeans i had previously been wearing.
they've got removable cold weather/rain liners, and the inside is pretty similar to the light mesh that you find in swim trunks. they're armored and have silver reflectors on the sides, and are styled kinda like cargo pants (two big lower thigh pockets on the sides (where the reflectors are), with zippered vents at the front part of each pocket (basically it faces straight forward while you're riding and is as outboard as possible so you get substantial flow when you're moving without having the fairings block the breeze).
they're part of a matching 2-piece i have. they're pretty solid, as long as you're moving, and you can stay reasonably comfortable in them just wearing athletic shorts and boxers underneath in probably up to 85* or so, and i really REALLY hate the heat. much hotter than that, and i don't ride, so i can't really attest to how they perform in the 90s.
the color really does have a significant impact on how much energy they'll absorb, so if you don't mind getting light colored ones (which will almost assuredly not match any bike), i'd say get the lightest you can find.
