I actually don't mind ep1 or ep3, I actually think Sith is quite watchable. I really liked it at the cinema, and have watched it about 20 times so far. (Had a half decent bootleg just after the cinema release)
I'm not trying to compare them to the OT, I just watch them for what they are....Quite entertaining films.
I do think that Sith should have been Ep2, and Ep3 should have been what really ties the two trilogys together. Obi-Wan trying to turn Anakin back, the twins being born then hidden, all the stuff we used to daydream about etc!
But there you go, we can't always get what we want!