aggressive paddles and tough paddles are 2 completely different things. if you plan on abusing your paddles and drive through a mix of hard pack, sand, ect. the toughest ones ive seen are the sand geckos, thick rubber and ive never seen the paddles break off. as far as aggressive for racing on the sand...they are horrible, heavy and do not hook up hard.
http://www.motorcycle-superstore.com/4/30/408/4875/ITEM/Kenda-K534-Sand-Gecko-V-Paddle-Sand-Tire.aspx
if you will ride distances on hard dirt roads and still want a paddle like tire then these will last a bit longer on a hard packed road and will still hook up well in the sand.
http://www.4atvtires.com/atvTires/showProduct.php?id=5092&cat_id=3
or
http://www.durotire.com/Tires/tabid/186/categoryid/89/Default.aspx
same pattern different maker.
finally, if you will ride a few miles on gravel before you hit the sand
http://www.rockymountainatvmc.com/Reviews/46/82/177/744/-/17501/Duro-Mud-and-Sand-ATV-Tire.
with this tire you probably wont win many sand drags but they do kick up plenty of sand for a "knobby" tire and they hook up the best of all the knobby tires i have tried in the sand and what i recommend if you want a tire that will work in sand but you will be riding long distances on gravel/dirt roads.
no true paddle will last long on hard pack dirt long. there is a small ridding area by my house that has some hills that are covered in sand but most of the area is hard packed dirt. new people to the spot bring paddles to try and drag race then ride out to the hard stuff and ruin good sets of paddles.