| I use the distortion on my Lexicon MPX-G2 which is great, and usually run an SWR Interstellar overdrive with it as well which is even better. As for pedals, your bass and amp will contribute greatly to how good they sound - I think both Dod and Boss do dedicated bass distortion pedals, and the distortion on the Digitech BP8 is really good - all worth checking out. Technique is a big part of getting a good disorted tone as well...
cheers
Steve | 
