I got stuck with customs stuff back when the limit was $500.....it's a relief it raised upto $1k, but something to be warey of.
Sadly, most sellers/retailers overseas aren't prepared to send in multiple packages, so you may want to order all your large pricey things a week apart from eachother.

Filling in customs forms by yourself with no real knowledge of which books'n'charts too lookup is no fun.
The customs officlas WON'T help you fill in forms, but WILL audit what you've done afterwards (which they basically correct all your fu*kups anyway).

I've only been thru it twice, and hope to never again.
MM.