But here's the thing, After episode IV, it's an end. You can stop watching Star Wars right there and still love Star Wars. Episode 1 and 2 draw you back to the Republic, before the Empire. Palpy isn't the Emperor. If you watch Episode V then immediately watch II and III you can still reasonably guess that he is the Emperor. Watching I II and then V he's still just the Chancelor. Plus this gives a bit more weight to the first introduction of Boba Fett, and Jango Fett. It establishes the link between Luke and Anakin, but doesn't explain how Darth Vader killed Anakin. I could agree to 4,2,5,3,6 and leave out 1 as a separate Star Wars movie. Though if I were to really go at it, I'd do a hack and slash of I II and III into IV, V and VI so as to preserve all of the elements, and cut out Padme's death, to preserve that part of the movies.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson