I have a pally who was primarily a healer and could take damage and he hit 60 but I am not satisfied with him as Blanc will not make a good pvp character and well since I reached end game with one character and am not satisfied I don't want it to happen again and so I have a 20+ rogue with no talent points spent and so I am wondering what way to go .......

If you want high burst damage go with a dagger crit build. If you want sustained dps go with a combat build. Combat daggers is the highest sustained dps cause you can use every move a rogue has, but swords tends to be more popular because of the constant bigger numbers. Maces are also gaining popularity as better maces are entering the game.

lets not forget though that, end game has some pretty crazy high dps swords.  but daggars still may outdue them with special skills

With equal-high-level gear dagger's will always do more damage in the hands of a rogue who knows what their doing. However pre-aq/naxx swords will always do more damage with the right spec.

If you're looking for absolutely the highest dps I'd go with a warrior. As a fury warrior you can pull more dps than a rogue can, but you require a tremendous amount of gear to do so. Warriors have a very very slow curve of dps until you start getting AQ/Naxx gear.

Combat daggers rogues are the highest dps in general.

And with the way rage and ignite mechanics are changing it will be no contest.

Go backstab spec if ur looking for those big numbers.

relentless attacks is pretty good, i get crits all the time, and master of deception and camoflauge go well together.