I\'ve been developing in Eclipse for a long while, but am taking a hard look at IntelliJ IDEA 9.0.3 because of its good Flex development tools and Maven flexmojos integratio
download a color scheme for IntelliJ such as "Classic Eclipse" from http://www.ideacolorthemes.org/home/
It a jar file then you do File > Import Settings...
and open the jar file and restart.
You should also go into Preferences > Keymap
and change to the dropdown to be eclipse sortcuts so that you can get about easier.