Re: What's your favorite 4x12 cab, and why?
I picked other because there's three in particular that I like equally, two are on your poll list. And I have no preference between top or bottom cabs, they both have their place and uses, so I like both.
1. Marshall 1960. They have that classic thing that can't be beat. Sure there are some really good clones out there, but the Marshall 1960 is just one of those bread and butter standards that do their thing and do it well. They also respond well to speaker swaps. Right now in my 1960A and 1960B, I have a mix of V30s and G12T-75s in an X pattern. The '75 isn't my favorite speaker because it's too easy to get happy with the treble and presence, but as long as a guy minds his business, all is good. This blend makes for a fairly broad tonal response. The mids are just right, and the bottom end is bold but not loose. I've also had Texas Heats and Swamp Thangs in the A cab and when I bought the B cab it had Soldano Purples and Legend V1216s in it. All sounded good.
2. Mesa Rectifier Standard. These cabs have a grunt to them that are all their own. The larger internal volume when compared to a Marshall makes the V30s in them sound a little more broad. It brings out a little more low end, seems to shift the mid spike a little lower, and does this thing that makes you feel it in your guts.
3. Splawn 4x12. As far as internal volume goes, they're in between a Marshall 1960 and a Mesa Rectifier Standard, IIRC. I've only had the factory Man O' Wars and Governors in mine, which are supposed to be one of Eminence's takes on the V30 and G12T-75 (I think it's closer to a G12K-100). They have a more subdued top end than Celestions do, though. This cab is fairly well ballanced and sounds good with any amp I've used it with.