Hi Tom,
A nice place to visit, if you have the time, would be the War & Resistance Museum (Oorlogs- en Verzetsmuseum) at Overloon (Scipio, is this the museum you were talking about?). It's about 70 km south of Arnhem, off the A73 highway. I was there last year and took a bunch of pictures. Lots of armor, though many pieces could use some work. There is an interesting Panther G restoration project going on at the moment, though.
I haven't been to the Airborne Museum at Arnhem yet, so I can't tell you anything about it. But they have a web page.
Hope this helps!
Marnix.