Greetings Jdh9,
I had a customer with a Nakamichi/Pass amplifier, and it went up in smoke when hooked up to a new, moderately difficult pair of loudspeakers. The problem was not with Nelson Pass's design, but with the fact that Nakamichi skimped on the output transistors and didn't use the ones Nelson specified. The customer wasn't playing the amp loud - it simply went into ultrasonic oscillation and grenaded, fortunately without killing the tweeters.
Anyway, if she does go with new speakers for that receiver, make sure they're a nice, easy 8-ohm load.
My personal recommendation would be along the lines of what Jvia suggested. Specifically, I'd suggest Magnepan's little MMG's and an integrated amp (perhaps keep the Nakamichi if the tuner section is worthwhile).
The baby Maggies are true entry-level high-end. They offer something absolutely unique in their price range: totally freedom from boxy colorations. In my experience women tend to like Maggies because they don't sound like speakers, whereas us guys often get distracted by how big the woofers are or how many watts or how loud or how deep, and we lose sight of what really matters. I'm not a Maggie dealer, just a sincere fan.
The baby Maggies are available mail order only for $550, and you have 60 days to return them for a full refund if you don't like them (or if you decide to put the money towards a bigger pair). I really think they absolutely rule their price range. Their only rivals are used MG-12's, which are indeed considerably better, but don't come with 60-day return privileges.
The main drawback of the MMG's is they don't play terribly loud and don't go real deep in the bass. But their bass pitch definition is superb, and you can get quite good bass extension from them by moving your listening position up against the rear wall.
For amplification, I suggest an Arcam or JoLida integrated amp (I sell the latter). Like the baby Maggies, the JoLida stuff is entry-level high end (hybid amps and tube amps within your daughter's price range even after buying the MMG's).
Best of luck to you and especially to your daugher. Far too few females grace our ranks, so I certainly hope that she is well treated by whoever she deals with.
Duke