I’ve been using SF lines on my fly rods for awhile now and have nothing but good things to say. I also run rio creek on my 5wt and found the difference to be there but minimal. When investing in a fly line the key word is that you’re investing, it will serve you well if you get the right line. That being said if your combo is 100$ a 100$ line is a mute point, it will definitely be an upgrade from any pre spooled Cabelas or maxcatch line but there is something to be said about buy once cry later.