I own and still occasionally use a 15 ohm 1984 Rogers LS3/5a as well as the new Falcon Gold Badges.
When I compare the two, my old Rogers, (which were tested to be in-spec annually by the CBS Broadcasting studio I bought them from) sound soft, and slightly blurred. Not nearly as concise and 'responsive' as the Falcons. No doubt parts have slumped and dried and drifted.
Button, when I switched from the regular Falcon LS3/5a to the Gold Badges I noticed a big improvement is focus (along with tone the reason for buying a 5a) and when I queried its creators they said the difference is the result of extreme "pair matching" (like 0.2dB or something) ; which I would now say could be the most important measurable loudspeaker perimeter, I've encountered.
I've also noticed the strong positive of pair-matching with planer-magnetic headphones. Technology that emerged in the last several years allows headphone diaphragms to be more evenly tensioned across their surfaces and this has led to a MUCH higher lever of focus and soundstage mapping precision.
I mention all this, because I think we do get what we pay for. And with this BBC classic I suggest going with the highest quality of materials and the tightest manufacturing specification.
peace and beauty
hr