Since you generally don't need to protect light tippet when fishing for smallmouth, I like a 9' 8-weight over lighter rods (i.e. no reason not to get the advantage of the heavier line when you're just going to be using stuff like 0-2x tippet....or heavier depending on your location, conditions). Big flies + potential wind = 8-weight in my book, hands down.
A typical WF floating line will probably be your main line, but sink tips, etc. apply depending on your waters --
"It all depends".