I voted the online Apple Store because of the experience I had pre-ordering the current generation iPad. The servers were a bit overloaded, but i eventually got my order through, even though at first it had like 5 of the iPads and 5 Apple TVs because I was thinking I hadn't hit submit or something. I'm hoping they do the pre-orders like they did for the iPad, right after the event, and not at midnight since that will be much tougher for me to do, would have to do it on my phone while finishing up work for the night.