How do Dunlavys compared to new stuff?

Kclone, easier said than done. Other companies might not have the technological know how, be willing to hand match components and tune each pair to a reference, deal with the large size and weight. Too many other companies seem to be more concerned with building uniquely voiced speakers, rather than accurate ones. The sad part is that John Dunlavy's health failed him before he could pursue his even more promising designs. It would be nice if someone could purchase the rights to those designs, develop them, and bring them to market.

Lipinski Sound speakers do seem to mimic the Dunlavy design.

One unresolved mystery to me was (I could be wrong on this, as rumors abound)that Mr. Dunlavy did not believe that speaker wire made a difference.
This is not to imply that all wire that 'costs more' is better, but that wires that are well conceived, made of purerer grades of copper (silver/gold)can sound better.
I've been involved in too many 'blindfold listening tests' to discount that. But the last I was aware he discounted this...odd it seems for someone with his knowledge.
I'll gladly fold if someone knows this story more intimately.

John Dunlavy didn't believe reasonably(?) standard wires made a difference. He claimed that audio reviewers regularly could not discern the difference in cables in his "blindfold listening tests". With that said, he did develop and market wires. His argument being that they followed sound engineering practices, but he still maintained that the differences of his cables and lamp cord were inaudible. The man didn't pull any punches.

I also have a pair of the Dunlavy SCIV improved, but not IVA's. I have had these for many years and they are still my favorite speakers of all time. They do more things right and seem to be so even balanced. They are extremely revealing, so you can tailor the sound you to what you want by choosing the equipment to meet your needs. Careful setup is important. But I am serious, they make instruments and voices sound REAL. They soundstage like nobody's business, and they still give me goosebumps after all these years.

If your room can handle the IV's, get them over the III's. If your room can handle the V's, GET THE V's.

I have had Klipschorns, ProAc's, still have vintage Tannoy Monitor Golds in custom cabinets, and have heard many other respectable speakers. One thing I can say with absolute certainty....I will be keeping my Dunlavy SCIV's for life.