Your re-edited fight with Mace and Sidious is excellent. By cutting out all the crap (Sidious' ridiculous faces, Sidious hopping around like a frog on crack), you actually made it seem better than it is. Bravo. Now you just need to recolor Mace's saber
Did you move the part with Anakin ahead a little? It looks like you did, and it stretched out the beginning of the fight so that it seems like the other Jedi weren't so easyily taken out by Sidious.
One suggestion: is there any way that you can edit the sceene to give Anakin even less dialog before he cuts off Mace's arm? In my own imaginary fan edit, I'd like to see Anakin come right up to Mace and cut off his arm, like he came into the room knowing that's what he would have to do. Maybe Mace can say "It's time for the rule of the Sith to end" or whatever he says, then Anakin just screams no and cuts off his arm. It makes his actions seem more deliberate. If you think about it, he had all that time in the Jedi Council room to think about what he needed to do, so he should be determined by the time he gets to Palpatine's office.
Did you happen to read my thoughts on having Anakin/Vader die in ROTS back at the top of this page in the Starkiller Ranch thread (http://www.originaltrilogy.com/forum/messageview.cfm?catid=9&threadid=3886&STARTPAGE=11)?