It is just personal preference. I am not talking about fishing for upper Mississippi flatheads with 6# test. I’d use at least 10#. Just kidding.
Like I said, when I first started catching bigger cats I was undertackled and I went through a phase where I did buy a bunch of HEAVY gear. Nothing was too big. But as I used that stuff for a few years it seemed as if I was always thinking about how much more intense and exciting it was when I used to catch these same size fish on the smaller gear.
Also my choices where influenced by what I saw as I traveled around. The guides on the Red using 6500s when my freinds and I were talking about 7000 (back when they cost $159). Dark30, you’re a Moyer fan aren’t you? I saw him up there with a 6500 on and E-Cat #2! Now that is light for those fish IMO. I’ve been to the James a couple times where we caught multiple 40s and 50s per day and while some, not all, of the rods where pretty heavy no reel was a big as a 7000. Denny Halgren uses bass tackle and 20 pound test line and lands more big flatheads than any man on Earth. I came to the conclusion that these guys where not all undertackled.
Now when I go out, I tackle up for the average sized fish instead of the top end sized fish. That is just what I like to do now. I just assumed it was process that a lot of cat guys go through.
5.3:1 just feels right for me. Actualy my favorite reel is a 6600AB that I bought because the thumb bar is nicer. 6.1:1 was too high so I then bought a set of 5.3:1 gears and a 7000 style power handle from Hatteras Outfitters. Now it is just right…..for me.