There is some debate as to which is better. Many swear by cfc compression and other don't. I've tried my ROM both ways and to be honest I couldn't tell a difference either way, regardless of what anyone may say. Since there was no difference, I went with non-cfc.
If you need a complete set of Sense 2.5 manila files for your skinning endeavors, you can find my complete Sense packgage posted
HERE.