The Boss DS1 could be the one to get! The original Japaneze versions are a lot warmer and beefier sounding than the new ones, but they cost more.
I'd get one of these off ebay, and then get the Ultra mod done to it by Robert Keeley, it would sound amazing!!! and despite the cost it'd be well worth it.
I'm planning on doing exactly this as I've descoverd that my Japaneze made Boss DD3 pedal is miles better sounding than the new DD3s! It's as if they are totally different pedals, but they look very similar. The Japaneze ones are a bit chunkier looking, and they seem bigger in size, sometimes you just can't beat the originals, epecially with boss pedals, as so many of them are made poorly nowadays.