Agreed about PR being on sale, just get the lot of them
And, Final Fantasy V was the point where the FF Team said, "We did a story game, now let's see what this hardware can do." See, their over-arching goal at this time, was to outsell Dragon Quest. I know that sounds insane but that's what was on their minds.
I remember reading a story that when one of the other leads (I think it was Kitase or Ito) developed the "Timed Escape" sequence from Karnak Castle, they got briefly addicted to trying to beat each others' best times. That's when they realized that they had something fun, and in fact, there were originally going to be a lot more of these events, but they trimmed it down in the end to just a few throughout the game.
One thing that FFV has always captivated me with, though, is its music. FFIV can be a bit stuffy, and FFVI a bit on the maudlin side. FFV's soundtrack has the benefit of being better sampled and mixed than FFIV, while not being nearly as over-the-top dramatic as FFVI. It is right in a sweet spot, where it's just totally gorgeous track after totally gorgeous track, after totally gorgeous track. They are all beautiful pieces of music, and they get you more pumped, the further into the game you get.
Even the ending, which I won't spoil here, but even the ending, which has a bit of a "Cotton Candy" Power-Of-Friendship thing going on, is just achingly beautiful and moving, in a game where most of it is not that way. It's all very nicely tied up.
And in the end, that's the best thing I can say about FFV. It's very well-put-together. FFIV is a bit slight, FFVI is a bit too heavy on trying to do everything all at once for everybody...FFV is a tightly packaged piece of software.