Here is a cool demo of the Boss DS-1 by Paul Hanson, whom you may know as the host of the excellent Boss US Podcast.

He shows how you can use the DS-1 with a clean amp or an already overdriven one. What I particularly like about this demo is that you can hear the tone on its own as well as in the context of a song (Bohemian Rhapsody in this case). You can hear how well a DS-1 can sound in an arrangement, which goes to show you what you can do with a non boutique pedal.