Have you looked at Source Audio website
? There are newer pedal options and the Hot Hand 3 that has a receiver that is amazingly small and will let you connect to Source Audio pedals and other brands like the Wah pedal can do but in a much more pedalboard friendly form. Although that Wah pedal looks like fun. At the online store at The Source Audio website they are running a factory direct special on the Wah
The BEF Pro will need a fuzz/distortion in front of it to excite the filter and get those synthy wobbles I think you are after. I prefer the Classic Distortion Pro, but they are developing a new overdrive/fuzz/distortion pedal that will be voiced for bass that sounds really exciting. Another popular choice is the Multiwave Bass Distortion pedal and it is available in all three pedal lines.
If you do a little more searching you will find a bunch of threads on Dubstep, hot hand and source audio.