L-2 and P-7 are the way to go. I never cared for L-5 since they removed the "run the red light" part. L-2 is more polished and more of an "official" release compared to P-7 since that is a proto ROM, however P-7 makes it feel like a new game since it adds a 2 ball multiball at 4th gear along with some other changes. I would get both ROMs and see which you like best. After switching to P-7 I never had the desire to go back to L-2 since I really like the 2-ball multiball.