Once had the PA 7, which I bought used. The sound is quite dynamic, supposedly better than the later model II. The PA 7 ran into class A, more than the PA 7II, which meant, a warmer sound than the PA 7II. Eventhough it had about 200W per channel, it did not well with too hard of loads comparatively with other 200 watt or 100 watt high current amps I have had experienced. All in all, if you get a unit for about $800-900 range, I doubt it can be beat for the money...even in comparison with amps that can be had up to 3k.
Nak tape decks may be great, but they are made out with plastic skeletons, therefore prone for mechanical failure (I.e: Dragon.)