That is a great write up! Definitely sold on synthetic, now I just have to decide what brand?
Amsteel Blue is a very good and easy to find. I bought mine from Rockstomper about 5 years ago, but there are probably some vendors here on RME that stock it.
http://www.samsonrope.com/index.cfm?ind=21&app=57&rope=192&inst=1