There has been a good discussion of the relative merits of rubber fuel lines vs rubber lines covered by a SS braid with the SS braid possibly considered overkill with respect to pressure, stiff, heavy, and expensive.  There may be some value in considering Teflon lined SS braided lines due to the chemical compatibility with nearly everything, high temperature stability, and long lifetime.  They are still heavy, even stiffer than the rubber SS version, and expensive.  They are certainly more than adequate since they are often used as brake lines with pressure response comparable to steel tubing (very little volume change with increasing pressure).
My system evolved into a system with the fuel pressure regulator located near the fuel pumps and outside of the engine compartment.  The leak prone fuel pulsation damper on the fuel rail was also eliminated.  The single fuel line to the fuel injectors (there is no fuel return line in the engine compartment) consists of aluminum tubing to the firewall, SS braided Teflon line to the water pump area of the engine, and steel lines to the fuel rails.  There was essentially no elasticity in that system which dead ended at the fuel injectors.  I didn't like the probability of high pressure spikes when all the injectors close simultaneously at substantial fuel flow rates.  So I installed a 2 ft length of firesleeved rubber fuel injection line at the end of the fuel rails as a shock absorber.  So now my system has the disadvantages of both the rubber and the SS braided lines.

Steve Boese
RV6A, 1986 13B NA, EC2, RD1A