what problems are you having with your brakes? doesnt it seem weird that both of your front calipers need replacing?
for pads, i use oem toyota parts. for rotors, aftermarket is okay, your existing rotors might have enough useful life in them to have them turned. for calipers, aftermarket calipers are only available for bbk upgrades. otherwise, you can get rebuilt calipers from your local parts store (autozone, murrays/cragen, napa, etc.) for a lot less than the dealership.