650 or 750 cfm. carb??

ok guys so what i see a lot of you saying is that the manual choke carbs. are jetted higher then the electric ones or rather the electrics are jetted down? correct me if i'm wrong. So lets say i wanted to buy a manual choke, then i'd buy a 650, but since i am wanting an electric choke i should look more at a 750 because it is jetted down? You guys keep mentioning holleys, what line do you guys think is best. ie. double pumper, street avenger etc? Don't forget that this will be a mostly street car with some occasional fun track time, so good street manners would be fairly important.