Unfortunately there is nothing out there like the SRO anymore. If I sound like I gush on them forgive me, because it's my all time favorite guitar speaker. It's the only guitar speaker that does everything I want out of a speaker from clean to brutal as hell high gain tones and every spot in between.
Take the clarity and punch of an EVM12L, add some of the midrange grind and chime of a Celestion, and add a bit of alnico compression that beautifully smooths the highs and adds air, while slightly shifting upwards the lowend punch the cast frame gives it compared to the huge extended lowend EVM12L's can put out.
They take overdrive, distortion, and fuzz insanely well, whereas with EVM12L's there are some fuzz pedals they just don't do justice too imo. Fuzz Faces and Big Muffs come to mind. When I feed the SRO's some big squarewave chaos they respond exactly how I want. I've had two OG smooth cones, and 3 reconed with ribbed cones. They all sound the same to me, but some people say they can hear a little difference between the originals and the recones.
They are also expensive. Not vintage Green Back or Black Back expensive, but $250 for a reconed one, and over $350 for original smooth cones was what I paid when I bought mine.
As much as I love them alone, four of them in a 4x12 is heavy as hell, so I have them mixed in an X with two Fane Medusa 30's in one cab, and two Celestion G12H100's in another.
Oh, and they are loud. Like 3db more sensitivity than a V30 or EVM12L. So are the Fane Medusa 30's. Both are rated at 103db.