What vintage speaker might you use today

I agree that you should define vintage.

But having had HiFi systems since the mid 70's and hearing a lot of loudspeakers, I would say any of the "L" series of speakers by ADS. These would be the "L"'s with the butyl rubber surrounds and bronze mesh grills. IMO these were the best I heard back in the day.
In fact, while waiting for a new replacement driver for one of my Viennas, I used a near mint pair of ADS L-520's for awhile in my system recently and was still amazed at how they sound.

Probably the large JBLs, Olympus enclosures with an S8R sysyem inside.

I've heard many speakers over the forty years I've been listening, but none has recreated the magic delivered by the original Martin Logan CLS electrostatics driven by valve electronics.

B@W Matrixs 800s

I've been using a pair of original Snell Type J for quite sometime now. I can't praise them enough.