Which Tonebone do you have? And... if you like it, why not get another one?
Of all the other preamp/DI pedals I've tried, I dig the B7K the most: Killer sound, DI, great EQ, awesome crunch (none to a lot). I also really dig the Aguilar Tone Hammer. I've tried Sansamps, but they color my sound too much for my taste... You can't get away from the "Sansamp sound." It sounds good, don't get me wrong, but that's not what I want.