IMO, no other rom can match BB. I've tried almost all of them: SS, smoked glass, ultimate droid, etc. I've even tried the latest ultimate droid (ese27) which is supposed to be the smoothest rom out there, but bugless beast still smokes it. There is just something about BB that keeps it above the rest. I haven't found a rom as smooth/fast as BB.
Plus BB has OTA updates now.