soz about the demons.
i never really thought G12T's sounded that bad. out of all the cabs ive played, it was common jcm900 marshall 4x12's (although kind of stock and not really thought of "ones to have") that i kept going back to. maybe its was just what i was most used to. my cab sounds better now (much better) with the X pattern. v30s and g12ts is a proven mix though i guess. though whether its done for its musical or economic value is something i don't know. its not much of a 'heavier' sound with that mix though. When it comes to heavy, id listen to roo.
Woo!
That's a first :D
I must say, I LOVE the G12K-100s mixed with EVM12L-black labels. They cost an arm and a leg, though. In those recordings I put up recently, the EVM12L black on the top row was the one miked up, and I'm really happy with the sound it gives, especially at gigging volumes. It's quite a neutral speaker, but its bass handling is unsurpassed, and it really allows the tone from your guitar and pedals to shine through, I find. Not too much colouration.
So, if money is no object, that's my recommendation :)
Otherwise, get 2 more G12Ks, or possibly stick a couple of V30s in there - but I'd want to try this out myself before buying them!!
Roo