Tube OTL amp for VAndy 5

You might want to just call Jud Barber at Joule and ask him. I have the Joule VZN100's with smaller Merlins and can say first hand they are a terrific match (well documented elsewhere all over the forums). Likewise for the various Kharma's. I know Bobby at Merlin recommends amps that aren't highly damped because his VSM's already are, so perhaps the Joule OTL's are among the less highly damped. I've tried the Joules on 3 other very different sets of speakers as well, all with great success, so I don't see them as being finicky at all. Having owned various Vandy 2's and 3a's, I can imagine their natural presentation coupled with the speed and purity of the OTL's would be glorious. I've not hear the 5A's with them myself, but Jud and Richard Vandersteen are gentlemen both, who talk very honestly with customers on the phone themselves. I'd start there if you're spending that kind of money.