Thank you VERY much for all of the feedback, all. As one of you mentioned, researching PSUs takes you down a bit of a rabbit hole before too long, and I was finding myself mired, muddled and confused within a half hour or so. I really needed a good starting point to figure out where I needed to go.
As it stands it seems that Seasonic has the trust/respect of a good many of you, so I'll start my research down that line and see where it takes me.
I absolutely do NOT plan on cheaping out on the PSU since, as I stated in my OP, it is the lifeblood of the system. But I know that price does not equal quality anywhere in the world, so I needed to be sure I was going to start researching PSUs from a quality source. You've reassured me that Seasonic is a good place to find it.
Thank you kindly!