Flash Builder vs Flexbuilder 3 for Actionscript only projects

Right now Flexbuilder 3 is my editor of choice for all as3, xml ,js editing.

I'm not 100% convinced that I need to upgrade to FlashBuilder. Also early betas seemed a bit sluggish compared to Flexbuilder3.

Does anyone who has made the upgrade have any convincing reasons开发者_JAVA百科? Was it worth it?

With regards to your comment about performance, I personally think it feels snappier than FB3. I have actually been using it for quite a while, and am really liking the small things, e.g.:

• Abbreviated type and variable lookup: Typing TFAS will auto-complete TextFieldAutoSize. Same goes for hEF, which will auto-complete handleEnterFrame() (if you have created such a method.)
• Vector auto-completion: If myVector is a Vector.<DisplayObject>, typing for example myVector[0].tra will now complete myVector[0].transform.
• Cmd/Ctrl + O will open an outline view similar to FDT's quick outline. The abbreviated lookup works in this view as well.

And of course, the bigger stuff includes improved navigator panel/package explorer, profiler and Flash CS5 integration.