Prices will vary a lot depending on what options you want and where you are located. We're in the US and have both full seats of CFDesign (includes solid body motion, etc) and a few seats of Ansys + CFX. Ansys + CFX was about 3X the cost of CF Design. If you can get away with a basic seat of CF Design the price difference will be even bigger. The ANSYS users are doing a lot of combined structural/fluid problems so are much happier with it all being in one place instead of having to use CF Design and then transferring the results to Mechanica for FEA but CF Design is well received for the fluid flow only problems. We never tried them, but CD-adapco is another CFD software vendor.