well, depends on any other intensive programs. spread sheets, design (like cad), programing (like .net, game engine design), and really any graphic intensive programs. You'll see an improvement. Good rule of thumb: is it sluggish on somethings? are you just going by what your friends say or are you having problems with it's performance? If you ARE having problems with performance, then hell yes! get another 512. If not, then its like the old saying: "If it aint broke, dont fix it."
If you argue with an idiot he will drag you down to his level and beat you with experience.
I am not a fast writer.
I am not a slow writer.
I am a half-fast writer.