Dochh22a4 has an Accord V-6 radiator in his GSR-EG and the radiator flows more water than his motor does, its literally impossible to overheat.
as far as cooling goes, you cant go too far, even for a daily driver, i wouldnt use the stock civic pint-sized radiator if i swapped anything, i would definately use a new one. fact of the matter is, you cant have a radiator that is too big for your application. i might use a fluidine replacement, but that is a HUGE upgrade from stock, switchin from a 1.6 single cam motor to a 1.8 dual cam with that dinky radiator would just be asking for problems in the long run.
and dont give me any of that "Kenny Trans 895hp drag civic uses a stock sized radiator", cause race applications like that are all 1-off units.
bang for the buck, picking up a used 90-93 integra i can guarantee will make your motor last longer.