[quote name='Osiris' timestamp='1506102487' post='3376533']
I'm quite happy with the Mesa so there's no pressing reason to change it. I was just contemplating moving it on for a 4 ohm cab on the assumption that it would be louder with the increased wattage from the amp. However, it seems my assumption is not necessarily correct and there are more factors that need to be taken into consideration. So I might just hang on to it now. Maybe....
One unexpected factor that has come out of the thread in favour of changing cabs is that of weight. I've no idea what the Mesa weighs but it's a good weight for its size, I'd guess around 15 Kg. I'm so used to lugging it about and haven't really thought about it before, but looking at the specs of the BF cabs, and getting older by the day, the appeal of something less than half the weight of the Mesa is very tempting.
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Ahhh - I understood (wrongly) from your OP that you had two reasons for wanting to change your Mesa: to get a 4ohm cab AND because you were struggling to lift it one-handed. Anyway, I can tell you that I definitely prefer lifting 7kg instead of 15kg nowadays . Just to add also that, based on my experience, I agree that the high efficiency of speakers like the BF 12" and 10" drivers makes the 8ohm versus 4ohm debate much less of an issue with a 300w amp.