you do understand there are barely any apps that take advantage of dual cores even though they have been out for a while. heck the OS is just now getting real support for dual cores and it isnt even out yet. by the time there is any useful application for quad, there is no question you will have wanted to wait for 28nm A15 SOC with radios for a true performance and functionality increase. but hey, to each is own right!!
The longer it takes the longer my device is future proof'd for. And if you keep waiting to buy a phone until things are made for it, you'll either always buy one just before its far superior brother comes to market, giving you a device which is a lot less future proof'd and thus of less value for your money, or you will never buy a phone.