I'm the proud owner of a pair of Focal 836v speakers and have been very happy with their bass response. Just recently I hooked up my Martin Logan Dynamo 700 10 inch subwoofer to the main channel pre-outs on my receiver to allow me to "fill in the bass" in direct mode for organ and other music that has low bass. I have it crossed over very low and the volume is almost at zero and it really makes the organ sound realistic, but I'm finding that I'm less satisfied with the majority of my music with the addition of the subwoofer. I can't figure anything out specifically, but something just doesn't seem quite right. I need to do a little A/B comparisions with the subwoofer on and off to see if it's having a subtle negative effect on the music that it really isn't necessary for. I hope you have the success that you're looking for. My sub was purchased for home theater and I think I'll be hooking it up to the .1 again soon and just not using it for critical 2 channel listening in direct mode.
I'm sure your new speakers are great, but I was pulling (after the fact as I read through this thread) for the Focals.