1979 Ski Nautique

That is probably going to get a pretty subjective answer. What wake are you used to?

It will definitely have a nice ramp for board sports.
Regarding slalom wake, by todays tournament boat standards, no it is not very good, compared to most boats of it's same era, it has a very nice slalom wake.

See CBass' post above

Can't answer why, maybe because the hull is so narrow?
Owned 2 different CC's with that hull and both had a decent wake for boarding. Never used any sort of ballast other then human either.
Sold my 80' to my neighbor and his kid used to ballast it up big time and believe me, it made a big difference.

I can't imagine a 90-92 NWZ is that much more expensive than a decent 1980 boat.   If I were looking for a budget ski wake, that's what I'd be looking for {:)}     I think a skier would be much happier with a NWZ hull than either a first/second gen ski, or a 2001, unless you were particularly looking for the older hull styles.   There were leaps and bounds of wake improvement through the years.

At 20 mph, my 71 Martinique throws a large wake. At 28 mph it is what I consider flat. Maybe not compared to modern hull designs but I like it. Not sure if the hull design is the same or what speed you intend to board but at 22 my Martinique is a PIA due to planing. It's hard to keep at a steady speed. When I first tried boarding, in the mid 90's, the high towers or extended poles were not as common as today. Our intended speed was between 20 and 22 mph. This was a constant fight by the driver. My driver got tired of fighting the boat and picking me up so I went back to slalom. It'll run 25 and above all day at the same level which makes it good for us to ski behind. We don't run the slalom course, just a lot of cut and jump.