According to the picture on the Internet, that IKEA chair seems uncomfortable. Which one may claim for most, if not all, of the IKEA products.
The question arises, what is better investment for a $1000-2000? Good listening chair or a good cable of some kind?
EDIT: If I have calculated it right and IKEA chair is stuffed with same foam as Sonex acoustic foam, it may be cheaper to buy a few IKEA chairs and tear them apart than to buy Sonex foam itself. Of course, if one wants that Sonex foam in the first place.