The main problem here is that all the titles I would recommend... are way over the top with the prices. ^^' Though since you're looking into Imports, you might find a copy to a decent price. Are you able to read Japanese? And is your Saturn modded? (the Saturn is regionlocked. I had to get a J-Saturn for the J-Games).
In any case I'd recommend to check Story of Thor 2 (the first part was for the Genesis). Panzer Dragoon Saga is fantastic too, but the price... is a killer, no question here. J-Copies are cheaper and easier to find than the US ones, so again: If you're able to read Japanese, go for a J-version.
Personally I loved Rayman, though it's hard as hell.
Synphony of the Night - as already recommended - is great too, even has some extra areas in the Saturn version.
And if you're a collector and in love with beautiful editions of games: Check everything created by Working Design. Their editions are mostly rare and expensive but so worth it~. (yes, I confess, I'm a big fan of their works).