Honestly who cares. Doesn't matter which one you go to someone will always be there telling you that what ROM your currently on is stolen from someone else and that something else is better. Choose one and go with it. I've used NexBeast and it works, I've used BB 0.9 and 1.0, I've used Cyanogen, and I've used Ultimate Droid. IMO Ultimate Droid has the beast appearance and best features that it comes with. Cyanogen comes with too much crap and slows it down, but it has the best themes out there for it.
BB and Nexbeast are great roms but the lack of APP2SD is just, well, disappointing. You wouldn't think that would be a big deal but having the ability to save all your apps to your SD card and then restore them with out having to download them as soon as you change roms is so damn nice.