I heartily endorse the 444 peach as well. Although there is nothing wrong with the SA Mastery either.

As for the 555, I bought one of the older version when it first came out. I loved the line for the first season but as mentioned above starting with season 2 memory set in and the line was better suited to use as a slinky than casting flies. I have heard that the new version performs very well, but I have been gun shy in regards to buying a new one. Does anyone know how to tell the difference between the old and new?