You can go with Rogero 4.40 but my advice is to stick with Rebug and wait for their 4.40 CFW.
Rebug are known for their professional work and their stable and reliable CFWs from release.
Rogero's CFWs are fine, but he goes through many versions before they become reliable and stable. 4.40 is still new and he's already on v1.03 because there were lots of issues in the previous versions. I'm sure he will release more versions fixing more bugs and you wouldn't want to keep flashing a CFW whenever a newer version is released.
That's why it would be better to stick with Rebug 4.30.2 for now until Rebug 4.40 is released. 4.40 CFW is not needed in any case yet because all games still work on 4.30 CFW without any manual patching needed.
CECHL 500GB: OFW 2.50 > OFW 2.76 > OFW 3.41 w/ dongle > OFW 3.55 > 3.55 kmeaw > Rebug 4.30.1 > Rebug 4.30.2
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Off to my summer vacation, might be AFK for a while... Happy Summer!