I used 2 use one of the aux sends form my mixer into a dirty old analog for filtering, I got some phat dirty stuff out of it, but it's mainly what U'd get from any sampler with a good filter+efx+mod... like eg on the filter/ amp, lfo to the filter, little distortion, etc...!

Doing what u sugested is a good idead but I reckon it's basically the same with the difference on the quality of the filter, etc.. on fm7 or any other...

There is a new quad filter by antares and another one by TC Electronics... it should be brilliant

Z