Looking for Integrated Amp for Dynaudio 1.3 MkII's

Postscript to my comments on the Special 25 and tube amps (as I couldn't seem to edit, having "previewed"): The Class A part may be key to Haden's reported experience with the special 25's. Most of the vintage PP EL-84/7591 amps up there on eBay have a cathodyne, or split-load, phase splitter/driver circuit. This circuit should really NOT be used with anything but Class A biasing of the output tubes for a very straightforward reason: balance between the two drive signals depends absolutely on the plate and the cathode sections of the driver tube seeing EQUAL IMPEDANCES -- this cannot be the case ACROSS THE FULL AVAILABLE BANDWIDTH when one or the other of the output tubes is cutting off! Also, it's possible, though not so probable, that Haden's amp had grid chokes on the output stage, or some other means to dump off any appreciable grid current which can lead to "blocking" in connection with the time constant of the coupling caps in circuit. Pushing a little amp hard is, of course, more likely to make such conditions unpleasantly obvious in the listening.

A used mf nu-vista m3 or a5 if you are on a budget

I had the Bryston B100SST and to me the Naim XS and Octave V70SE just destroy the Bryston in every way. I traded in my Bryston for the Octave. Both the Naim and the Octave are high current integrateds and the Bryston is not. That being said I fought my audio dealer for over a year thinking the Bryston would be too hard to beat. Well an in home demo proved me wrong in the first 10 seconds of listening.

The 1.3 mkIIs can be a touch hot sounding on the top end with some amps and are a tad towards the warm side of sound overall.

That and their appetite for juice makes Class D amps a very good option.

Toe out/indirect tweeter orientation can be used in placing the Dyns to help tame the top end as well if needed. Thtend to image and sound best this way in general I have found

I owned these speakers for some time before moving up in the Dyn product line, and depending on your room size and preferred listening volume, your NAD should be fine. Jaxwired is correct in that these speakers do not have the brighter treble some Dyn models are known for, so if you decide to change I'd look for an integrated from NAD, Plinius, Simaudio or other good SS manufacturers with more power/current.

If you want something different, by all means try a tube unit. Tubes can definitely provide a different sound, just as the same album may sound very different when played on a turntable vs via CD or DAC.