Personally I would look at newer designs, unless the Radians or 801's were so cheap as to preclude you looking at something else.
The Dunleavy sound was by today's standards very laid back in the treble with a big sound stage without the more pinpoint imaging of some other designs. They sounded big and musical also the deep bass was not particularly deep considering the size of the speakers.
The best thing about the speakers is they do sound very big and are warm and forgiving.
The Radian's offer a smaller sound stage although with much greater image focus, tighter bass and greater resolution.
The 801's sound a bit smaller, tighter bass, a more precise sound stage.
I would go for a pair of Legacy speakers, the Focus SE or the Larger Focus, similar smooth midrange, big sound stage and tighter more visceral bass, tonally very similar to the SC 4