Here is my current PvE raiding DPS spec, basically Marksman/Nightblade/Ranger:

I've been experimenting a lot with different 35 builds during beta 6 and I haven't been able to find a single build that deals more damage than this, but I'm always open to improvements.

Note: The actual ingame values are a bit different I think, as I'm pretty sure I had all of the relevant Marksman talents maxed out, could be mistaken though.

Note #2: I will eventually finish the 15% damage on Nightblade, but getting Strafe was far more important than 5.5% more damage. Once the level cap goes high enough I will expand on the Nightblade tree further.