For throwing rope in a tree, this is the way to go.
http://www.baileysonline.com/itemdetail.asp?item=21430&catID= The best rope to throw? This is what I've found:
http://www.baileysonline.com/itemdetail.asp?item=D200+ORG+150&catID= As for a throw weight, these work very well:
http://www.baileysonline.com/itemdetail.asp?item=984&catID= Then finally, for the actual rope that will be doing the work, you can't beat Amsteel. A wee bit pricey, but where you need strong rope that won't break, this is the stuff to get. Strong as wire rope, will float on water. I was doing some tree work last year and got tired of breaking ropes. Bought a 150' long piece of 1/2" dia. and never regretted it.
http://www.baileysonline.com/itemdetail.asp?item=12ASB+150&catID= I ended up shopping around, but Bailey's is great for a one stop shop. Sherrill Tree is another good one.