High Pass (Brick Wall/Rumble) Filter Suggestions

Hi Folks:

I'm interested in trying a high pass filter to eliminate any rumble, vibration, feedback from getting to my table. I've seen the KAB RF-1 http://www.kabusa.com/frameset.htm?/accesss.htm and have read the reviews (which are favorable) but wanted to see if the community had any other recommendations. I want to make sure that I'm not losing anything or altering the rest of the frequency response by using a filter to take out everything below 20hz. Thanks for your suggestions.
Post removed 
Post removed 
I use the KAB rumble filter with my VPI Prime.  It works as it should and does not decrease the bass or dynamic range.
Just so you'll know, the Fmod filters are only 12dB/octave, not exactly "brickwall" !
OK, ordered the FMOD from Harrison and will give it a try. If it works I can see whether the KAB offers better performance for a bit more scratch. Thanks as always everyone!