Leveling through PvP with a question about weapons

[Crushgroove]

Hello all! So i'm fairly new to the rogue class and had a question about what weapon to use for an off-hand for PvP'ing levels 20+. My current gear can be viewed at http://www.wowarmory.com/character-s...&n=Crushgroove

I currently have the Sacred Charge and Thrash Blade BoA swords and was wondering what off-hand weapon to use for the PvP brackets above 19. I am currently thinking of going for the Combat spec like http://www.wowhead.com/?talent#f0hZMtVb0b and love the idea of have a sword MH and a dagger OH. From everything ive read it seems like you want a fast OH weapon for poison proc's. I am about to get the BoA Scarlet Kris and was wondering if I should do this or stick with the dual swords. I am looking for the best DPS option.

Also as a side note what would the best enchant be for the dagger? +15 Agil, Crusader, or the +5 weapon damage?

Thank you ahead of time.

[Thyce]

Pretty sure Crusader is still ftw, but I, didn't know Sword/Dagger was viable at all.
Pretty sure it's Fist/Dagger, Sword/Sword (Or Axe/Sword & Sword/Axe, whichever), or Mace/Mace, due to Weapon Specializations. Correct me if I'm wrong, but, yea.

[Kikazz]

fast off hand slow main hand for pvp you want to have mind numblking on main hand and crippling on offhand. and spam sinister strike like ya spam other things ;D

[Kikazz]

also you would want to have 2 fist weapons or daggers and get off hand specializatrion and cloe combat specialization thingy,

[Crushgroove]

Thank you for the responses. I am not looking for end game gear but more for the best BoA weapon combo to use while leveling through the various battle grounds from 20 - 59. I know i could go dagger/dagger but I already have the swords and really wanted to continue using a MH sword. I also know that i could be using the BoA mace in the MH but for the purpose of this topic i just wanted to make sure that i should go grab the Scarlet Kris as my OH weapon. The fast OH is still for poison proc's correct? Does a sword/sword weapon specialization trump this?