Oh, and FYI - it does require a Synchrosoft dongle, in case that's an issue for you. And, Filter Freak that I mentioned above requires an iLok. The others use serial numbers or challenge/response.
I believe that there are demos available for all of these.
Realistically, there are only so many filter shapes, and in the mix, its almost impossible to tell which one is which. On top of which, most synths these days can take an audio signal and use their filters to process it, so I would think that everyone has at least one or two really good multimode filters in their arsenal.
EDIT: For some reason I thought I was replying to a post of yours saying something about more flavours being good when it came to filters. My brains already hurting and I haven't even commenced NYE celebrations yet..?