Thank you for the suggestion; I will try searching that way. There is a pet food store several miles from me that supposedly carries Solid Gold. That being the case, I'm going to call and see if they carry other higher-end brands.
You've listed my #1 fear: buying a fairly pricey product only to find out that Simon won't eat it. Of course, Felidae's website lists grandly-worded testimonials that make me really want to buy at least a small bag for Simon. Assuming that the testimonials are all true (not doctored in any way), they are quite impressive, especially the last one coming from a female Reverend who seems to really love and care for her cats.
I am, however, very impressed with petfooddirect's website. Should I be unable to find Felidae (or other good cat food brands) locally, I will go the online route.
Your suggestion is so common sense, I'm now feeling rather foolish for not having thought of it myself.
I will try that, too.
Thanks so much, Guys!