wtf mate..
first off no one started flaming except one guy, although computertrendy was a bit rude. and also he was asking how to change the serial number in his
current hard drive, so telling him "buy a smartxx hard drive" wouldn't be an answer either. Just calm down guys, its no big deal.
The reason I say get a new eeprom, is because you're hd serial and eeprom info are both recorded when you get on live. But they allow you to use the account on another box. So if you plan on upgrading your hdd, flashing a brand spanking new eeprom on there will give a new eeprom/hdd serial pair for the xblive records, making them think your a different box.
That's my theory anyway, I don't think there's any other way you're going to upgrade a larger hard drive on live without getting banned. You just can not change your hd serial.
anyhow, whatever you choose to do, good luck.