definitely the one with v30's
but I bet the g12m + g12t75 blend better and will sound more toneful with most amps
they have close volume levels and almost opposite EQ
the v30 tends to completely bury the g12t75 sound, except for the extra low end
I recently bought a 1960A with t75's
it sounded very dark and scooped, which was good for my modded JMP, but too muffled for my zambelli hyperdrive (which is more bogner voiced)
then I took out the g12t75's and installed a pair of mg music black dogs (I guess they're similar to weber silver bell) and a pair of rola celestion 55hz G12M (blackbacks)
the black dogs are greenback type speakers, but fatter, darker and wider sounding
the cab sounded really good, but the black dogs were much louder than the blackbacks, so I could barely hear the celestions
so I sold the old G12M's and installed UK made V30's (I think it's the 70w made for mesa)
the v30's sounded louder and much brighter than the black dogs, but not a huge difference like the black dogs x blackbacks
I'm happy with the tone, but it's much harsher and more spikey than the previous combination
I regret not trying to combine the G12M's with the G12T75's
the G12T75's were very bass heavy and mid hollow, while the G12M's lacked low end and were very upper mid focused
I believe they would blend perfectly