danish cabinet + chair ID Help!!  

Not certain. . .
Not certain about the chairs, but the sideboard looks like a McIntosh of Kirkcaldy, Scotland piece to me. It's the leg structure that gives me that impression.

This McIntosh display...
This McIntosh display cabinet has a similar leg assembly to your sideboard/highboard.

Yes
I think it's McIntosh of Kirkcaldy too.
Not sure about the chairs, but wouldn't be surprised if they're British, inspired by Danish.

Chairs by Troeds
I may be wrong but look under the seat, remove cover fabric if it's there and you should be able to see a stamp for TROEDS, Sweden

The legs
on the piece lionel shows vs the ones on the McIntosh piece are perhaps inspired, one from the other -- but each detail is different, making me think they could not both have come from the same source. Once a series of decisions is made about the construction and (resulting) appearance, it seems unlikely to me that those decisions would be discarded -- unless it could be shown that a lot of time would be saved by the alternative method, or the designer (and the manufacturer ?) were of the restless sort, always trying something new ?
Looking closely, every single element is different, from the shape of the leg to the form of the intersection to the rail -- and one has a cross piece visible behind the leg, apparently missing from the other.