http://www.doversaddlery.com/ariat%C2%AE-brossard-lace-winter-paddock-boot/p/X1-38575/?ids=0msrnquifv4u4g45nhmh0t55
I love these boots so much, I wear them well into season when it's too warm for them^^^but they aren't cheap and not sure you'd want to trek through mud too regularly, I only ride in them (w.half chaps).  So yeah, they don't fit all your criteria but figured I'd chime in because they're such comfy boots.