I am wondering how NetBeans and IDEA compare with eachother in supporting Maven based project creating/importing and general development of maven based projects. Any comment or experience about them will be appreciated.
Sorry, I don't know about Maven Support in NetBeans or in IDEA, but I do know about Eclipse.
I am fairly happy with the Maven support provided by the m2e plugin for Eclipse. It has gotten better over the years, and Eclipse doesn't seem to get in the way too often. The dependency mechanism within Maven is nicely integrated with the build path mechanism within Eclipse so that the editors are aware of the included classes. And importing Maven projects works fairly. If you plan on doing web app development work, make sure you get the additional plugin to support Maven with WTP. Also, there is plugin to support Android development, though I have some issues with that plugin (they tried to bend Maven to use the Android source file structure - I would have preferred to see it the other way around, but I managed to overcome that and my Android projects now have the same directory structure as all of my regular Java projects).
But, as Hussein recommended, there is nothing that beats first-hand experience.