Lines are a pain to change I think. They just take a lot of time and you NEED
a 10mm flare wrench for the brake line nut or you are in for a world of hurt. Everyone uses Goodridge for brake lines. Everyone recommends these lines and when I got them I noticed zero improvement.
Since I paid $0 for them, maybe my cost/benefit analysis may be jaded.
Get any old fluid as long as it meet the spec in your owner's manual. I used Castrol LMA as it pretty good and English fluids are always better.
Unless you swap fluid like your underwear or track your car, brake fluid is brake fluid.
I have to hide now before the "brake dorks" attack me.