generally people use 300-350dpi
Some people prefer 350 for clarity especially if there is alot of contrast/detail or fonts
multiply 300 (or 350 or whatever you used)by your length and width for how many pixels to make it, in the end just save out a frame as a psd and print it at the dpi rate it was created.
i had framerate issues just hitting the space bar, but if i clicked the ram preview button and let it make all the frames then it will play back real time once it is done.