Thought I posted in this thread before but I just searched and no, so here goes:
Wharfedale:
-EVO 4.2, any other EVOs
-Linton and/or Denton
Monitor Audio:
-Silver and Golds (prefer towers, but any)
Fyne:
-any, but especially their larger towers, 500 and above
Devore:
-any, although the Gibbon models make more sense
PSB:
-any that have the ATC 75mm dome midrange
Something else planar- either higher end Martin Logan's or larger Magnepans since the LRS's proved so crappy but also difficult to test? (or, heaven forbit, actual Quads)
Klipsch Heritage:
-La Scala, Cornwall, or Forte- essentially any of the classic "large horn" designs that you can fit on your test rig to tackle some of the myths and lore around these types of speakers.
Edit: My comment about horns drastically underestimates the complexity of testing horns. For example, the early large Klipsch speakers used exponential horns I think(?) but the current versions are all tractrix horns, while their new reference towers use tractrix horns. Still others, like the Altec Lansings in the Heathkit Legato I inherited use exponential horns but with segmented divisions. Then there are JBL diffraction horns, and constant directivity horns, and what is the short piece of horn on the Fyne's (and Tannoy's) concentric tweeters? I guess it's like the beginning of a constant directivity horn or is it something else?
Could potentially assist by shipping examples to you, contact me directly to discuss