The best IDE is no IDE at all
IMHO...
PS:
What I mean is, the very best tools for kernel hacking tend to be command line tools. If you make the effort to become comfortable with them, on their own terms, the sky's the limit in terms of what you can learn and achieve.
If, on the other hand, you feel most comfortable with GUI tools, then you'll probably find kernel hacking unsatisfying and frustrating. Again - just my opinion, nothing more.
'Hope that helps .. PSM