Well the only way you can jailbreak a PS3 is by being on 3.55 firmware or less. For the best CFW that's a matter of opinion but most people use KMEAW 3.55 CFW. Since your question has been posted in the wrong section (http://www.ps3news.com/forums/ps3-ha...lp-121859.html) I will move and close this thread.
If you need to ask any more questions, ask it in the "PS3 Help & Support" section, thanks . Closed.