Rogue PvP Talents (Riposte question)Follow

(Yes I know Hemorrhage is being nerfed)

Recently I've become more active with my rogue again, and it surprised me quite a bit to see all the hatred against some (in my eyes) PvP staples, namely Riposte and Improved Slice and Dice.

Now I'd prefer to mainly appeal to those that consider at least Improved Slice and Dice and Slice and Dice a (very) good skill in PvP; if you do not, you probably have no business here.

My main question would be about the strength of Riposte in comparison to Improved Slice and Dice, is the latter worth sacrificing so you can gain the former?

I've included a few sample builds that played in my mind:

(Improved Slice and Dice with Riposte, at the cost of Malice)
http://www.worldofwarcraft.com/info/classes/rogue/talents.html?0000000000000000000003023550122055100000012005002530002301210000000

(Only Improved Slice and Dice, but with Malice, one point fewer in Nerves of Steel)
http://www.worldofwarcraft.com/info/classes/rogue/talents.html?0050000000000000000003023052022055100000011005002530002301210000000

Obviously multiple variations exist, point can even be gained from Dirty Deeds. Any bright new insights would be appreciated!