I've tried Dragon and Omega and some of the leaked JB's but in my opinion the best ROM is the official one. The others constantly inject instability into my phone and don't last very long. They also don't seem to add any useful functionality that I need. I will wait for the official JB before upgrading again...
Samsung Galaxy S2 GT-I9100 16g w/32G SD
Samsung Galaxy S3 16g Blue SCH-I747M w/32G SD - SIM Unlocked
Samsung Galaxy S3 16g White GT-I9300 w/32G SD