Antminer does not use 1 kw. And its availiable now. It use araund 420w for 190 ghs.
There is no import tax, only vat on declared value.
However, since it is shipping from the US (or China) it will take longer to arrive and the customs can hold it up for a week. In addition to that, if it is send using regular mail (USPS etc), then the customs do not believe the declared value and ask me to send an invoice. I can do that preemptively if I have the tracking umber, but if I don't, I have to wait for their letter (takes a few days). Then I would have to tell them that I paid 1.9BTC for it and could have problems if they don't know what BTC is or if BTC has risen in value since then.
And hopefully the HEX8A1 will get higher hashrate with newer FW (because chips can do up to 40GH/s or so Bitmine claims).
That being said, I am quite tempted to buy one Antminer...
I am one of the earliest antminer buyers, bought for 4.5 btc. Costoms worried me very much and my eu country has 25% vat.
But nobody can prove you that you did not preorddred it at low priceor buy it for credit.
Bitmain sent me ups general inovice and declared 120$ with free shipping. That was imo too low and costly ups can not be free.
So i have made myown inovice and beside 120$ added150$ for shipping.
Bitmain sent antminer from china on saturday and all clearence and shipping took 4 days, got it wednesday. Paid around 100 $ for vat and brokerage.
You just to have inovice (pdf) with good description, price and shipping, also paying method included. Actual prove of paymant is required only if something does not add up. On inovice i placed antminer logo and make it looking good.
Till now i mined 3.7 btc if anybody want to know.
As for marto miner, he show sadly very shipping delays and many complaints. Wish you luck though.