Well I finally got new speakers for my Twin so I thought I'd post my dumbass opinion on them.
I bought a Weber California (ceramic, 80 watts, 8 ohms, 2" voice coil, 101 sensitivity) and an Eminence Swamp Thang (ceramic, 150 watts, 8 ohms, 2" voice coil, 102 sensitivity), both used on Ebay.
The test amp is a '78 Fender Twin, 135 watts with master volume and pull boost for those that aren't familiar. I used a 90's Squier strat (Wayne) and a Carter pedal steel, both clean, no overdrive as this is my pedal steel amp.
I tested each speaker individually first by installing them both in the amp, and connecting one at a time. I kept the impedence correct by connecting the speaker being tested to another 8 ohm speaker laying face down on the floor behind a closed door.
I dig the Weber California a lot. It has sharp but smooth highs, and some good midrange punch that should cut through the mix nicely. It also seems a tad louder than the stock blue label Fenders. It closely resembles the "Lloyd Green" sound I was looking for. I actually seem to recall reading somewhere that the California was modeled after the old JBLs they used to put in Twins, and that's likely what Lloyd used with his Twin if he wasn't using 15's (which is more likely).
The Swamp Thang on the other hand is not my cup of tea. It's got that "icepick treble" I'm not a fan of. It also seems to lack the mids I was looking for, and oddly enough even though it's rated 1 db louder than the Weber it seems a little quieter. It does have a powerful kind of sound though and probably just needs some more "breaking in time" so I'm going to hang onto it.
To complete the test I connected them both together. That didn't sound so hot to my ears. Again the icepick treble, and it seemed like the Swamp Thang sucked all the mids out of the California.
I reeeeeally like the sound of the Blue Dog and the California together, nice and smooth but at the same time sharp and punchy. Problem is the Blue Dog is only 50w. I'm thinking I'd like a ceramic 75 or 100w, or just a higher wattage alnico Blue Dog to install permanently in there with the California. Only thing is the Blue Dog is only 99db sensitivity I believe, and I need all the clean volume I can get.
So the hunt's not over, but I think I'm close! Hope this review was helpful to some of you dumbasses.