Also, there has been some debate about getting the Rapier or CLS in regards to the combat evolution.
Once the update goes live the cls and rapier will share the same stats/attack speed, but will have a different attack type. (stab for rapier, slash for cls)
Honestly, even in the beta the rapier would still be the better choice, at least as far as PvE is concerned. The stab attack type is invaluable especially for metal dragon tasks and many slayer monsters. Moreover there are very few viable stab weapons in the game, making the rapier even more necessary, whereas a whip/vine whip can be supplemented for the cls.
I would argue however that the CLS is slightly better for pvp in the EoC, although I'm not sure if attack styles even have any effect on other player.