I am buying a hp 500 Designjet plotter. Does anyone know if I need the hp-pcl3-gui, adobe proscript version of this plotter. Or what this is even for? I print standard acad drawings I have acad 2002. I do alot of 3-d drawings. The difference in price between the base model and the proscript is about 0, I am not sure wether i need it or not. They both come with 16 meg of memory that I will have upgraded to 64meg. Of course i will have to buy and accessory card for 9 and the memory for 6. Does anyone think I do not need this memory? I would hate to spend 0 when i dont need to. Most of my drawings are 20 to 30 meg in size, Im not sure what that is in plot memory. Will the plotter crap out with out the additional memory or just be slow? Thanks in advance for any help Greg Willard