Not sure if this helps anyone, but through my own tweaking, i've set the nVidia settings AA etc. to off and used in-game to set anti-aliasing and texture quality. Specs : 3700K @ 4.2K Mhz, GTX690, 16GB RAM, 240GB OCZ Revodrive3. With SWTOR Unleashed, my settings are all at highest and it's really smooth.
One thing that helped, and I actually find useful now and avoids that juddering around highly-populated areas, is to turn off scale nameplates with distance. Since I do a lot of PvP, it actually means I easily see enemy nameplates popping out at me... some people may find it annoying though I believe this is juddering purely related to a burst of CPU usage when entering these areas, so can't blame the GPU in this instance. Perhaps i'm wrong, but maybe it will help somebody.
With my ram though I can put 9GB of "stuff" into Ramdisk, which has helped alot. Perhaps around 10fps gain in places where it drops down from 60 to 40 when turning a corner... GTN comes to mind.