You already got your answers on the plain JB ROMS and already know about CM10, but I'd like to point out something to you. What makes you think you have to run something like SVoice if you're running a skinned JB ROM? You don't have to. For example, I dumped SVoice a long time ago and have been running Google Now (Jelly Bean voice search) since an earlier Synergy ICS ROM. I'm now on a great JB ROM that's real stable (Synergy v.118), but it's a TouchWiz ROM. SVoice is still long gone and Google Now is working like a charm - just as it has been from the first day it was brought over to ICS. I even have other nice things ported over, like the Note2 camera. I understand if you simply want a plain JB version and/or don't like the Samsung icons, but don't think that you can't also have something like the Google voice search (Google Now) you seem to want.