Could somebody give me some tips?

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http://androidforums.com – My parents recently updated from their Evos to the Galaxy Nexus. I unlocked the bootloader and installed TWRP. SOOOO much easier than my Evo LTE was. I have a few (possibly silly) questions: 1. What is a good stable solid ROM? My mom hates when anything at all goes wrong and it scares the heck out of her. 2. What is a snappier ROM with some bells and whistles? My dad likes shiny and new. I installed JBSourcery for the time being. 3. Are there any issues with kernel compatability? Like the Evo's Sense kernels and AOSP kernels. Or will all kernels work with all ROMs of the same Android version (General)