SS lines usually go for 150 - 200 and are an amazing first upgrade
TT calipers are 4 pot and are in high demand for its oem mounting config.So they are also sold for other kits for 1500 for the exact same calipers
My car weighs a ton but with my calipers even though it feels like it won't stop, i just need to press a bit harder and it will everytime.
1 emergency stop is worth the extra brakes as a frontal collision is 99.9% always your own fault meaning higher insurance and tickets.