First few weeks: ran synergy (flawless version of stock samsung ICS rom)
Next month: ran beans (equally flawless version of stock samsung ICS rom)
Since then: AOKP (steadily improved AOSP JB rom that is 99.5% flaw free)
Now on AOKP build 4.
If you are happy with the stock ICS software that came on your phone, then synergy, beans, or cleanrom would each give you improved stability, battery life, etc.
If you don't know, you can make an image of your phone that at the drop of a hat, any time and any place, you can restore. So you can safely have your "nandroid" backup of your stock phone, try out a rom, and then go back to stock 15 minute later if you think the whole thing blows.
That's how I went to jellybean AOKP. I still have my nandroid backup of stock, day-1 setup. I don't think I'll be going back though.
OP, looks like I trolled your thread and derailed/hijacked it. Sorry.