David welcome to the Village! There are two questions that you need to answer about your potential saw.
One - Will the saw be new or used?
Two - Are you mechanically able to support a used saw?
Three - How much money are you willing to spend on the saw?
There are about 3 major price ranges for scroll saws $99 - $225, $300 - $600, $1000+
A very large group here use the DW788 Dewalt, I have one and it has given me good service. Personally that is what I would choose, you can always upgrade to an Excalibur saw at a later time. Which ever saw you decide to get we have a great group of folks here willing to answer your questions. Again welcome to the Village.
DW