I have now tested kepler in 64bit and 32bit windows environments. Not extensively, but so far I like it. The hop from indigo to juno was not painless and not worth it. The hop from juno to kepler is pretty clean.
I am including links just for convenience, here is my update process;
I downloaded and installed the latest JDK for windows, not the EE version. http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
I downloaded Kepler, the EE version. I have no real clue what is the best version for me so I went with EE. http://www.eclipse.org/downloads/
I copied my various workspaces to a folder labeled Juno Workspaces.
I started up Kepler on my nastiest biggest worst kludged workspace and ran my worst project. Seemed OK, no real issues.
I highlighted the project and did a Source-Cleanup on it. I looked over and accepted a rather large chunk of changes and ran it again. Faster startup, and smoother.
I ran source-organize imports, sort members and finally format. Code runs fine.
the auto suggest seems solid, control-z and control-y are fine. Control-F seems to pop up faster.
I have not yet imported anything but I played a bit with the build paths and it seemed smooth enough. So far, I like Kepler a lot more than Juno.