Cabelas microtex. The stuff is awesome for the price. If you are patient it will eventually go through the bargain cave and you can pick it up for cheap.
The Kryptek gear we have been using is real nice but the price is starting to get up there.
+1. I wear microtex pants, they're really quiet and I have two seasons on my pair (100's of miles through brush...) they're tough.
I wear an under armour top with long sleeves...if it's hot I wear the heat gear, if it's cold i switch to coldwear.
I wear a wool shirt over the top in the morning and keep a mountain hardware ultralight windbreaker in my pack all the time.
QUIET is the key for bowhunting. You can break all the branches in the woods without spooking game, but one denim brush against brush and they're gone! Microtex pants are awesome- i just ordered a backup pair!