Good start on your quest. First, you need to know how big a supply (how many watts) you need for your anticipated build. Include a little extra for future expansion such as a second hard drive or other components you may want to add later.
Many online vendors power have a power supply calculator page on their site like
this one on newegg.com that will give you an idea of how much power you need.
Then, consider whether you want a high efficiency supply. Typically, these cost a little more, but they use less power, overall, so they don't cost as much to run, and they run cooler, so you'll also save on the cooling requirements for the build.
Once you have those parameters, you can start looking for info about the reliability of models that meet your requirements from various manufacturers. Many name brand vendors get their raw supplies from several actual OEM manufacturers, including Seasonic and others, and package them under their own names so you may find a better deal on exactly the same supply with different manufacturers' labels.
I'll leave it to others to recommend specific makes and models that meet your needs.
Hope that helps.
former high tech guy needs info on modern tech (power supply)
