To the OP, save your money. Since you want to save money but still want to upgrade the stock brake system. I would suggest getting TRD brake pad first. Be warn its dusty, a worthwhile trade off imho. Your truck will actually slow down when the pedal is push. The higher maximum operating temp will give you an extra margin of safety on extended use.
Next, do the braided brake line. I have the Goodridge set and its a big plus. Easier to modulate the pedal, make threshold braking easier as you have more accurate feedback. Also give you a nice excuse to flush your system with some good stuff. If thats not enough, upgrade the rotors. Cross drilled, slotted, or both. Its mostly preference as which one to go with. All these 3 upgrade combine will cost under $500, not a bad upgrade while being on the budget.
TRD pads :
http://www.totallytwistedcreations.com/html/hp_brake_pads_0.html
Stainless steel brake line (Goodridge) :
http://www.totallytwistedcreations.com/html/ss_brake_line_kit_0.html
Rotors : you on your own as I haven't gone that far