I used to go through a pair of Muck Boots every year chasing grouse and WC in the Northeast but am now using Aigle Parcours 2 rubber boots.

These boots will be on their third season this fall. The natural rubber is still supple and they are holding together well. Muck boots rubber gets dry and hard after a while. When I got my Aigle boots I had to order from the UK but you can now order them directly in the states. They are also quite comfy for rubber boots and are a bit lighter than the Muck boots.