graphical integrated development environment recommendations?

With the wide range of users on the list, I'm sure there are plenty of opinions on what are good graphical IDE's and which ones to avoid. I'd like to get away from using notepad.exe to code with due to its limitations. Something that supports syntax/code highlighting and has browser previews would be nice features. I'm looking at Aptana (www.aptana.com) but it seems like it is more complicated to use then it should be. Either Linux or Windows IDE (i run both OSes) recommendations would be fine.