I think definitely on my bucket list build would be a custom antares or aliante from master craftsman Busyman Cycles. He takes regular modern tech saddles and creates a unique and luxe finish to really set off a build, fully custom to each individuals requirements. He provides a beautiful artisanal perch to really finish off a build in style, even matching up custom bartape options. Browse his blog for examples of his fine leather wares. There's also a couple of nice interviews with Mr Busyman Nick Peel here and here.