Please check out the Custom Hardware forum! But if you really can't do even a tiny bit of research yourself, do yourself a favor and buy BitMain Antminers. They deliver 180GHs in as few as 3 or 4 days for less than 1btc each. As far as I know, no one else can beat that offer... at least until the Bitmine (different company) miners (and clones) become more readily available.
+1
It makes no sense to preorder an asic for 3 btc when you can buy a bitmain antminer for 1btc and get more power and shipping now instead of who knows when.