There is one other speaker that will almost outperform the EV.... I had one in my Mark IV combo when I sold it as it was the only speaker that would not break up with a high master volume setting. I never realized how much compression you can get from the Mark IV until you set the master output past 6. I had an EV in the combo before but could not get past 5 on the master without issues. The "holy crap I $h!t my pants" speaker was a Fane Studio 12L. I was fortunate to find a dealer in US and bought one just to give it a shot. When I wanted to get more of them to stuff into my 412 cab they stopped selling the Fane products. What a pisser. It was not exactly an EV clone as it did tailor the tone just a bit, but I think the frequency response was flatter than the EV. Awesome speaker actually. Still hands down for any Mark amp the EVM12L speaker is hard to beat. I prefer the Black Label version as it is the closest construction to the Mesa EVM Black Shadow. The Classic EV is a bit too soft on the bottom end (Had one of those two and found the Black Label to be better). Perhaps a blend of the two in a cabinet would work fine. As for the Fane, you did not hear it much when you were sitting close to the amp, sure it was loud but it really projected amazingly well, probably due to the shape of the speaker cone as it was quite different than your typical guitar speaker. It was also taller than the EV and had a square flange frame which made it a front mount vs rear mount in a combo as the amp chassis would not fit back into its position if it was rear mounted on the baffle.
I have pictures that I cannot post any longer as the photobucket kicked itself again. This time for good I guess. Need to find another photo host for posting images. Heck I cannot even log onto it anymore. I did a search for it and found one of my images I had posted on another forum. I had the Fane Studio 12L mounted next to the EVM12L Black label in my old OS Recto 412 cab. In this situation, the EV one. for a combo application it worked with the Mark IV a bit better than the EV for some odd reason. Mark III was awesome with the Black shadow EV. And so far with my cab reloaded with the EVBL it is perfect for the Roadster, JP-2C, Mark V such that it would be hard to remove them again. I did try to get away from the EV but not possible. I would highly recommend the EV for amps that are in the 100W range especially for a single combo like the Mark V. Not so necessary for a 50W amp or lower but will still do a good job. If Mesa were to ever create a JP-2C combo, they would have to use the EV speaker as the peak output of that amp is 150WRMS even though it is stated as 100W. The MC90 would not last very long in a single 1x12 combo JP-2C. You would need a minimum of 200W RMS handling.
https://www.bing.com/images/search?view=detailV2&ccid=eZUG59NM&id=E97D274A32312426DAE0965F2B3E35ABA0CBB10C&thid=OIP.eZUG59NMO7KEHa5PIEFP5wEsDh&q=fane+studio+12l+guitar+speaker&simid=608016059046953246&selectedIndex=30&ajaxhist=0