I purchased from Innisilicon the A4 Dominator. Its not bad. I will make a setup video soon. But there are many vids on Youtube and Tutorials in Bitcointalk.org.
The other option is ebay. Most miners are over priced but you can occasionally find a good deal.
Oh yeah there is Bitmain but they are pre-orders and Bitmain is a bit of a jerk with his UAHF threat.