Well if she is paying you have to have the biggest and best there is !
If you are determined to have a true "scroll saw" look at "Hegner" it is the Rolls-Royce of saws but costs a small fortune.
Seriously, give us a little more idea of what you want to do with it and those of us with experience of the various types will be happy to advise. For example, I have:
1. An old "Coronet" band saw, three wheel, all cast iron and a beautiful machine which is so useful. It will cut rough, large timber and very fine, tightly curved work. It is all down to the type and size of blade you use. I cut metals and plastics with it as well as wood.
2. I have a "Machine Mart" scroll saw which I seldom use.
3. I have a tiny "Proxxon" vibrating saw which is amazing for very, very fine and delicate work.
Roger in France.