Is there a modern equivalent of Allison Ones?

Aktchi, if a rear-ported speaker is designed and tuned for corner placement, that can work well. The AudioNote AN/E is an example of a rear-ported speaker that's intended to be placed in a corner. What they do is tune the speaker quite a bit lower than normal in anticipation of the generous boundary reinforcement from the port's being almost right in the corner. The result is very good bass extension without boom.

Lower tuning calls for a longer port, and longer ports are more likely to have internal midrange resonances (think of talking through a cardboard tube). By placing the port on the rear of the cabinet, any midrange resonances are less likely to be audible out in the room.

I think the Audio Note technique is good enough that I paid 'em the ultimate compliment: I copied it.

Come to think of it, the AudioNote AN/E should be among the recommendations for Springbok's system, as it's designed for smooth power response when placed as intended - definitely an Allison-esque approach. In fact the speaker's lineage traces back to Allison: The AN/E is a modern incarnation of the Snell Type E, which was designed by Peter Snell, who was a disciple of Roy Allison.

Duke

I know this is not what you have in mind, but the very best floorstander ever made to go against a wall is the NHT 3.3 IMHO.

Amoung the most versatile, in terms of placement, and best sounding along the wall or in corners that I've heard is the Gradient Revolution (active), though I bet the passive version would be no slouch.

Audionote speakers also sound very good when placed in corners, but, then again, that is where they are designed to be placed.

Although they are not designed for corners, I've heard Spendor S5 and S8 in small rooms, and placed somewhat close to the corners and they sounded decent as well.

if we're talking corner placement and balanced sound..gradient for sure. out of the corners, any full range sealed design that doesn't favor certain frequencies would owe a bit (directly or indirectly) to roy, henry kloss, and other AR alumni.

So there is no confusion, the left speaker could go in a corner or up to 3 feet from the corner and the right against the wall but not in a corner. Don't the Revolution and/or Evidence need 100 WPC of SS power? I have a tube amp, 60 WPC (Jadis DA 88 Signature) that may not drive the passive Revolution, according to the reviews. Size is not an issue, Duke, as they can be as high as they need be and provided they are not hugely wide, not an issue. I will look into the Audio Note. Thanks for the helpful suggestions, all.