Import Duties for Hong Kong

I am looking to purchase a brand NEW pre amp direct from a Mfger in Hong Kong. The price including shipping to Connecticut is $700

What surprises in terms of duties, taxes, and fees can I expect to incur when this thing hits the USA??

TIA, Dave
I purchased an amp from HK a few years ago at a price of $1400. I don't remember the exact amount, but it was under $40 - This included a $5 fee for the shipper (DHL) for paying the duty upfront. I'm sure there is some government website that you could use to find this out, but, suffice it to say that it won't be a huge amount.