If a direct quote from an existing guide post is a valid answer to the question, you should probably be reporting and not replying.
Originally Posted by mufasalord
Hello all, I found myself in a slight problem. I know as a combat rogue you will want a fast OH weapon, and a slow MH weapon. Now if i have say 2 weapons that hit 2.60 speed would use a combination like that or would a combination with a 2.60 weapon in MH with a 1.80 dagger OH work better for my dps? basically should i be using daggers in my OH? Didn't see anything in the 4.3 guide so im asking here. Thank you.
"A note about weapons, there are no fast 1-handed Agility weapons in Cata and you will almost always want a 1.4 speed dagger in your OH. With exception of the dagger sets mentioned above you will want to use a slow MH, slower will generally be better if the stats are the same."