What kind of car door speakers are good for bass?

so i want to buy new speakers for my truck, but the ones from the doors, im guessin they are the 6 1/2 ones, n iwas wondering, which kind of speakers would be good for the bass? like because on my sisters truck the bass sucks and well i want some speakers that you can turn on all the bass to the radio and not suck n yes ido have subs in the back! i just want to replace the door ones with some new good ones. thank yall for yall's help