As to whether your warped rotors put any serious wear on the pads, I’d rather doubt it, UNLESS you’ve put on a lot of miles in that month, or unless the pads turn out to be scored or glazed. Check for wear, scoring and/or glazing when you remove them and take it from there.
There is a lot of debate about which break pads are the way to go, or rather, the way to stop. Since OEM rotors are supposedly designed to work with OEM pads, there is an obvious solution. However, as long as the pads are of good quality, the risks include not as good of stopping power, shorter life, and accelerated wear on the rotors. The good news is that there are not many pads around that will let off more dust than the OEM pads. There is a recent discussion by someone who is using a type of premium dustless break pad. He’s had good luck with them in the past and sees no reason not to continue to use them.
IMO the breaks are the only thing between you and certain death. Don’t cheap out.