Budget Mini-ITX Build (Need Help)

Hey, I'm building a new Mini-ITX computer. However, I'm not talking about some Intel Atom processor, I'm looking to run a Sandy Bridge or Ivy Bridge processor. The processor must be a dual-core and clocked above 2.0Ghz. I'll be putting 4GB of DDR3 1333MHz RAM in the computer. For storage, I'll be using an SSD. Yet, I need to keep the price as low as possible. I'd also like to use the thinnest Mini-ITX case possible. For the listed specs, what power supply will I need? How many watts? I'm not looking for a standard ATX power supply, it needs to be thin and small. So, what case do you recommend, and which power supply? Additionally, are there any motherboards you'd suggest? I'd love some feedback, thanks.