I would get the one I recommended only becuase it's cheaper and I've heard that it works well unlike the other.
That connector is what you need, how many peripheral connectors are you going to need? Which and how many are going to need the SATA power?
For instance my Rosewill 450w has 6x Peripherals and 2x SATA.
I run 3 case fans, one HD, one IDE DVD burner, and one connector to light up my "XION" on the front of my case.
I however still could run 3 case fans, 2 DVD drives, my XION light, and 2 Hard drives becuase my Masscool 80mm side fan has a 3-pin motherboard Fan connector.
I think you will be able to fit everything you need with the Xclio I labeled and one converter like you posted.
Still tell me EVERYTHING you will be needing power for and we can make sure.