I've played one Heiden. It was a beautiful instrument and had killer tone and volume. I played it along with a Gilchrist, Loar and Monteleone. The Monteleone was my favorite, but I liked the Heiden second best. Of course, on a different day my ears might have heard them differently. The Heiden costs less than half of a Monteleone, but there was also a killer Ron Cole I played that costs maybe a third of what the Heiden costs. I'd buy the Cole over the Heiden only because $10K is too much for me but I wouldn't say it's too much for the Heiden.
Arches F4 / Newson F5
Crump B1 / Old Wave GOM