What about Bybee Filters?

Any one who has used the Bybee Filters please report on your results. I'm thinking about modding my Sony DVP-S9000ES and trying to figure out which mod package to go with. Modwright highly recommend the Bybee's, but I'm skeptical. Is the powerline IEC inline filter the best bet? Or the speaker bybee? Or the IC bybee? Do you have to get them all? Which makes the most difference, and is it a good difference? Or should I just go with a higher mod package and skip the Bybee's? I am in the dark on this.