We're tearing out the old, rusting brake lines from a 2002 Saturn SC2, and we're replacing them with new NICOP brakes lines. Nickel-Copper is easy to work with and is probably the best choice for DIYers, for that reason. No splits and you can bend much of it by hand. My best choice for flaring tools is the Lisle double flaring tool, #33260, used in this video. Good luck on your project!