I have the Winston BIIMX in the 5 wt and I love it. I put the RIO Gold 5wt line on it because the guys at my local fly shop told me the line was a half size bigger, and said that the extra size would help the rod load faster, and does it ever! It throws the line like a cannon, which I need in the wind here in Nevada. I have a 6wt BIIX winston that I thought was the last rod that I would ever need, but when I came to my senses and remembered that he with the most toys wins, I bought the 5wt mx and loved it.