Thanks for your input - I'm feeling much better
I got the SAME Sailbiker jacket that I just purchased a couple of weeks ago on the US NAP site. The price difference is SUBSTANTIAL in my book - like $700.
Nice! For what it's worth: I had shoes shipped from London to NYC during the Summer sale and the shoes ended up making it to NYC before I did. I couldn't have asked for more. I wouldn't recommend it if you're not sure of the size as recovering the taxes and duties is probably a pain, but that's obviously not relevant in your case.
I ordered the same jacket this morning because I couldn't resist the price. I never liked it on pictures, but you convinced me to give it a go IRL.