[CME]

I've always done a fresh install. And if you're going to get pt11, you may wait until it comes out to install anything. Because nothing out now will work in 11. I guess it would make some sense if you thought you'd need 10 and 11 on the same machine. But I think I may get a new HD and start from scratch with 11. And not have anything from 10 on it.

That said, I'm pretty sure Phil O'keefe (HC forum mod) just used migration assistant to move everything to a new MBPr with no problems. Guess it wouldn't be the worse thing to try. You could wipe the drive as start over almost as easy as starting over anyways. So there's a bit of a look from both sides. Lol.