Personally, I prefer GNU Emacs (aka Emacs.app) over Aquamacs.
I have a rather large .emacs that's followed me faithfully from Solaris to Linux to Windows to Linux to Windows, and Aquamacs refused to work with it. I spent about a week trying to get them to work together, but gave up and switched to Emacs.app and got everything running in a day.
So, just a warning. Aquamacs is fine for simple .emacs, but might throw a tantrum if you want to do things like have a non-standard color scheme or keep your .emacs OS and Emacs version independent.
I have a rather large .emacs that's followed me faithfully from Solaris to Linux to Windows to Linux to Windows, and Aquamacs refused to work with it. I spent about a week trying to get them to work together, but gave up and switched to Emacs.app and got everything running in a day.
So, just a warning. Aquamacs is fine for simple .emacs, but might throw a tantrum if you want to do things like have a non-standard color scheme or keep your .emacs OS and Emacs version independent.