I'm getting the info on the running line from SA's information bulletin on their website -- assuming it's current. Looking at the bulletin, it would seem to address the issues mentioned in this thread, but only so much can be gained from it -- nothing beats time on the water.
As far as wicking goes, it's enough of a problem for Rio to menition it on their site. I've found that nail knots do not prevent wicking as the end of the braided core is still in contact with water. I would suspect that better performance by other brands reflects differences in core material and construction. The only sure fire method is a sealed tip. I've heard that some use Zap-a-Gap but I haven't tried that glue -- yet.