I use Seaguar Red. it is cheaper than Invisix that is the reason why I chose it and have been using it for the last 3 years. I buy a 1000 yard spool and it lasts a good while.

Some of the things you don't mention are cover, water clarity and potential fish size. I'm gonna' want heavier line if I'm fishing an area with the potential to product a double-digit fish and especially if I'm fishing heavy cover or timber. Poor visibility (off-color water, lily pads, grass, etc.) lets you get away with a heavier line too. In a San Diego clear lake without much cover, you can get away with a much lighter line because you can let your drag wear them out. Here at Fork you want to turn their head and get them in the boat as soon as possible so I'm using the heaviest line I can still get bit on.

15 Invizx
It gives you better feel than mono.
It is supposed to be harder for the fish to see than mono.
It stretches less than most mono lines.
I like Invizx better than the Seguar Red but that's just me. The red was too wiry for me.
15 is relatively small in diameter but still pretty strong. If I were going to Falcon and getting bit by big fish all day I would have a spool of 20 Pound test with me if needed or switch to P-Line CXX in 15# test. CXX is one of the strongest lines I have ever used.