I would suggest staying with filemaker. Filemaker current has a special going on now, you get two copies for the price of one. You can buy direct from filemaker or from (See Mail-Page on the special Price link) another retailer store. The upgrade price from 8 doesn't look any cheaper than buying full version price.
Current Special Price For FileMaker Pro 12 and FileMaker Pro 12 Advance.
S Chamblee, thanks for the input and the links. Looks like I'll just buy the full version.