Kenwood would sound nice, as would sansui, but would it be enough power and grunt?
Often, it will not.
To properly pair the Vandies, you need an amp with proper wattage as well as reserve power- ie,
Conrad Johnson are usually up to the task. Rare top of the line supreme series kenwood may be. Kenwood also had some L series (I believe) amps, that came after the Suoreme series, that I'm sure are up to the task. Sansui gear? I own plenty or have owned plenty. Super gear. However, unless you are messing with the absolute top of the line models, they ain't going to allow the speakers to live up to their potential.
Typically, the best amps for this type of duty, are the boutique amps like Classe, Krell, Audire, B&K, and the others I mentioned.
There are many solutions to one problem. Find one of these boutique amps that has the reserve power, or a top of the line Yammie or Adcom or Kenwood or Sansui or the like-and it will do the job.
Answer these demands first-
Proper WPC.
Proper reserve power (high current/slew rate).
Proper build quality/durability/ability to handle heavy loads and low ohm ratings.
Then- worry about sound signature. Warm? Neutral? Bright? This is the fine tweaking.
I'd personally probably run B&K on them. Warmish amps that sacrifice some of the edginess of certain solid state gear with the sacrifice of a bit of resolution.
Others may find their ears, speakers and room prefer a brighter sound- more resolution, at the possible expense of listeners fatigue or shrillness to some.
Some may go neutral. Still, depending on your room, your speakers and your ears, this could sound dull, lifeless or boring. But a good match to your room, speakers and ears may say it's ideal and the best solution.
Happy holidays.