Did you mean SD-1???
The SD-1 is like a Bad Monkey or a Tube Screamer with a more pronounced mid range. I have the Monkey and the SD-1 and I'm leaning toward the SD-1 for the midrange growl. Both are very organic and tube-ish.
I read your post and I thought immediately that you reversed the two consonants. SD vs DS.
The SD-1 has a lot more edge than the Monkey. $49.95 everywhere. I luuuuuv my SD-1.
John