I also use BFD with much success. I have a combined HT / 2ch setup. The outputs from my controller are crossed over using an Outlaw ICBM(I'd rather leave my controller in analog bypass mode for 2ch), with the sub output from the ICBM going to the BFD. Certain low freqs from the front of my room don't do well at my listening position, independent of mains position, so getting equalized bass to my sub did wonders.
Doug