It's one of these things where the word may be known from antiquity, but we can only guess at its original pronunciation. Therefore it's difficult to say one is 'more right' than the other. A-noobis versus AN-u-bis is another discrepancy in a similar vein.
To me, the SG-1 pronunciation makes more sense, but only in that it fits better into pronouncing Ba‘al Zebûb in the most common manner. Bear in mind that 'Ba'al' on its own simply means 'lord', and beign a fairly common word was almsot certain to be subject to variation.
Not that its a definitive source on this (as none by definition can really exist) but Wikipedia gives the pronunciation with a fricative in between two syllables - suggesting a prounciation similar to SG-1's.