I just skimmed the pages quickly and compared it with three firms.
Rockminer http://shop.rockminer.com/goods.php?id=45
It's offered 3522mBTC, shipping fee included!!!!!! But it's quite unfair, the delivery should be charged based on the distance, therefore it should be different from each other. And now, some nearby foreigners have to share the shipping with the farwaway ones. Since they take it into account, suppose, they do make some profit from shipping fee
ZeusMiner https://zeusminer.com/product/rockminer-t1-780-840ghs-1000w-controllerbtc-asic-miner/
Priced at $369. You've to pay shipping fee. Delivery starts within 3 days after payment confirmed. The price is quite attractive.
Zoomhash http://zoomhash.com/products/800ghs-900ghs-bitcoin-asic-miner-1000w
Priced at $599.99. It's quite weird that it states 800GHs-900GHs. Maybe they credit T1 with power it doesn't possess.
I'm hesitating to order one. Zeus's offer holds an attraction for me but it just begins to be on sale. I'm not sure.
And what's your guys recommended PSUs. Someone mentioned that 1000w actually was not correct. Any information provided will be appreciated. 
Rockminer http://shop.rockminer.com/goods.php?id=45
It's offered 3522mBTC, shipping fee included!!!!!! But it's quite unfair, the delivery should be charged based on the distance, therefore it should be different from each other. And now, some nearby foreigners have to share the shipping with the farwaway ones. Since they take it into account, suppose, they do make some profit from shipping fee
ZeusMiner https://zeusminer.com/product/rockminer-t1-780-840ghs-1000w-controllerbtc-asic-miner/
Priced at $369. You've to pay shipping fee. Delivery starts within 3 days after payment confirmed. The price is quite attractive.
Zoomhash http://zoomhash.com/products/800ghs-900ghs-bitcoin-asic-miner-1000w
Priced at $599.99. It's quite weird that it states 800GHs-900GHs. Maybe they credit T1 with power it doesn't possess.
I'm hesitating to order one. Zeus's offer holds an attraction for me but it just begins to be on sale. I'm not sure.
And what's your guys recommended PSUs. Someone mentioned that 1000w actually was not correct. Any information provided will be appreciated. I have used them before they are good. Here is a video guide on how to set it up:
http://youtu.be/ykUzheGDXZg
Also Eyeboot (authorised rockminer distributor) is selling them for $500 usd here:
http://www.eyeboot.com/Bitcoin-Miners-btc-mining/rockminer-t1
If you use 1200 watt psu then you can get 880 gh+
Also they have less than 1% rejection rate because you use the BE controller and it is stand alone miner instead of running via PC and cgminer.
THX klintay, it helps a lot
