I’ve tried a bunch of different brands of lines in the past couple years, and currently use mostly RIO lines now.
RIO trout LT (half line wt lighter) is great for surgically placing small dries to picky fish, I have this on my 10’ 4wt.
I have Rio gold on my 8’6” 5wt Helios ZG and is the best all around line I’ve used on that rod. Dries, streamers and Indy rigs. It cast them all great!
My 9’ 5wt Clearwater (primarily nymph) rod has the RIO Grande line (half line at heavier) on it. I originally bought it for my Helios but it was way to heavy for accurately casting dries at longer distances, for me at least. However it is good for roll casting nymph rigs and is a great back up general line if I bring someone else with me who doesn’t have a rod.
I have their 3wt Avid line on my 7’6” st.croix 2wt and it casts as good and far as I need it to. A little less smooth in the hands than RIO’s better lines but it works fine for small streams.
The Orvis line currently on my 7wt is trash. The head dives casting streamers and won’t turn over steelhead Indy rigs for shit. Will be getting Rio for this next year. Not the first Orvis line to disappoint me either lol
Id also stay away from ARC fly lines, they have a zero stretch core and if you get tangled on something and yank the line hard it can snap. Happened to me this spring with a brand spanking new line.
Scientific anglers also has decent stuff, I’ve just had a couple lines prematurely dry out and crack on me, but it may have just been from heavy use.
If your going to be doing a little bit of everything, then the Rio Gold will be your best bet all around line.
Fly rods are like golf clubs, every one has its own purpose, and the line should match that to maximize the rods performance.