When it comes to bleeding air, you have two options. You either go with a t-line or res. I prefer a res myself, and as far as commercially available reservoirs go, the Swiftech Microres is what I would recommend. Either way, you normally want the res or t-line to feed into the pump inlet so that when you are filling the loop your pump doesn't run dry. You don't want your pump to run dry at all. If possible, a res or t-line works best when mounted at the top of your loop since air naturally rises.
I use a sepatate old cheap PSU with the ATX connector shorted out as per the instructions above to power the pump when initially filling. I prefer not to use my expensive PSU that is in my setup for this. If you do use your case PSU, unplug everything just to make sure you don't have any power going to your components when filling and leaktesting.
Don't forget some way to drain your loop as well by either having a plugged T connector at the bottom of the loop, or by being able to remove a hose or whatever. People often forget this simple thing and put a new setup together and then forget that they need a way to drain it out.