Words of thought CFW and PSN were never meant to co-exist. It is only a matter of time before a ban happens and valid keys are hard thing to come by and can last only a day before getting banned again. So you need to ask yourself which is more important to you. Folks sell valid keys from $50-$100 so risking a ban to play online for a matter of hours at times can be costly and hard to find.
PS3 CECH-2501A [CFW] & CECH-3001 [OFW]/ PS2 SCPH-3901 & SCPH-7501/ PS1 SCPH-5501
Mod Cobra 4.46 v7.00 w/ E3 Flasher [CFW] & Cobra ODE 4.50 [OFW]/ Mod HDD-OSD [Phat] & Modbo 4.0 [Slim]/ Mod MM3
HDD 1tb [CFW] & 640gb [OFW]/ HDD 640gb & OPL v0.92 w/ 1.5tb SMB