Please Let me know the most stable combination of linux kernel & toolchain...

I'm newbie of omap3 and have a gumstix overo board not a beagle board.

I'd already built a virtual machine with development environments
followed the howto document of overo.
However it needs so big places about 45GB(overo uses bitbake, so this
terrible size).

I want to make a new development environment not using the bitbake.
The linux console image size is about 40MB and I need a compact build
environments.

Please let me know the most stable combination of linux kernel &
toolchain for overo board.