I am planning to bring a sr-009 or l700 to the US from China. It will be inside a checked bag along with a dac2 and hd800 that I bought with me on the trip. I carried that combo with me on the plane a few times and nothing went wrong but this time the headphone would be rather new. How likely do you think the custom guys would find out? What would the do if they did? If the stake is high I might have to buy a l700 instead and put it in my backpack.