If you were going to mildly work your falcon i6, ie headers+exhaust, cam, intake and flash tune-- would it be worth it to upgrade the injectors to say around 25-26 pound and update the fuel pressure as well? with a bigger pump? would the extra pressure and capacity be worth the $$$ with just those mods, or would the standard injectors with an xr regulator do the job?

standard wil be more than adequate