Brake System Upgrades
The common misconception with braided brake lines is that they offer better braking performance. What they do offer is better feel and consistency as they are not prone to fade. OEM rubber lines expand under heat and bulge resulting in a loss of brake fluid pressure which translates to a sensation of brake fade and a 'sponginess' felt at the lever after prolonged use. Hence you feel like you need to apply more and more pressure at the brake lever for the same amount of braking performance over time. Braided lines alleviate this problem as they do not expand and therefore maintain strong braking performance and offer a more progressive and consistent feel at the lever particularly when the brakes are being used extensively for example on track. They are an extremely worthwhile upgrade particularly if you intend to ride on track frequently. However, on the road where you are highly unlikely to be exerting the same amount of braking force, and therefore generating as much heat, you are unlikely to feel any difference to a well maintained set of OEM lines. For road only use you will feel more benefit simply changing the fluid periodically and thoroughly bleeding the system.
Hel, Goodridge, Spielger and Galfer, to name but a few, all make very good brake lines which are very similar in terms of quality and price. Again the situation is the same for brake pads with the top manufactures such as Brembo, EBC etc offering similar products. That said the OEM pads and brake lines are actually rather good. If you are predominantly only road riding then the only really necessary change you need to make are brake pads and fluid.