Rapiers would indeed be cool, but they don't fit into the time frame of crpg. Also, I feel like they would be rather OP... 115 length or something crazy, with something like 105 speed.
Would probably have 20 or so cut damage on the swings (at best), but stabs would be insane, no doubt.
Also it would be awesome to have a European-styled longsword with a curved blade.