Sure you can ship to a US address as a US customer, but there goes your warranty with Amazon directly. I doubt very much if MyUS will help you there. If you have family/friends, sure, but it's a mission.
I'm not sure I understand you as using a forwarding service has no impact on the one year warranty. The disadvantage of course is that it's going to cost you if there is a problem as Amazon will only send parts to the US address so there will be additional delivery fees. I checked this out with them directly.
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