There was a company at NBAA last year doing corporate retrofits on the CRJ200. The aircraft uses a lot of runway and is a bit heavy on fuel burn.
I really have nothing to do with the selection process. I was offered a job with this company last year when they were going to get the Legacy. I just spoke to them yesterday asking if I was still available that they were settling on something soon.
I think your choice is excellent in the CRJ-200. Just checked it out, it would be perfect with a corporate interior. I would assume it could seat about 20 in a moderate corporate set-up. Not talking about big giant seats, but nice and comfortable. A max of 20 is what they'd like to carry. Short trips like they're planning on would be quite nice for that plane.
What would one go for $$$???