Thanks for the suggestions Lewis. I've tried quite a few distortion pedals, several different bass ones and some really great sounding guitar ones but none of them compared with a real amp. I heard quite a few bass played who have used guitar amps for distortion, both Jason Newsted and Robert Trujillo used an SVT for bass tone then a Marshall for distorted tones. John Wetton used an overdriven Hiwatt through a 4x12 for an amazing distorted tone with King Crimson and it's certainly not uncommon to mix a DI and overdriven Marshall or Mesa through a 4x12 in the studio so why not live? It's certainly much easier to hear and isn't lacking in low end because of the DI