First and foremost, if you've got no confidence in your original set-up then either there's a problem with your braking system or you're Noriyuka Haga in disguise.
All braking systems can of course be upgraded (at an inflated price) but you must make sure as stated by 'Desmo 748' that what you have is working at it's optimum, chances are that it may not be and that a little wise money could be spent in servicing your system, rather than splashing out on the latest 'carlos fandango' aftermarket system.
Naturally if the bling factor raises (by placebo effect) your braking confidence then who am I to advise otherwise.
Just as an afterthought, it may also be worth looking at your suspension set-up, as braking and susension work very closely in the confidence stakes.
Hope this helps.