Sidestepping the build plan for a moment and going back to the original post, I'd also like to point out that if by "Best DPS Rogue Build" you want the *highest* DPS build, that's probably somewhere in the STR-based THF space. TWF doesn't make you do any more Sneak Attack damage than THF (see overdamage section in
here for a good explanation of why), and the peak damage (outside of sneak attack) from a good THF build is usually a bit over that of a good TWF build. I like some of the TWF possibilities a lot -- take away only a small bit of damage to include some debuff (cursespewer in off-hand, for example), or dual-wield Wounding Puncturers if you happen to have great uber-equipment. But if you really want to be king of the DPS space, you might want to look at a STR-based build with multiple THF feats.