I have a Protec soft case for my General Music S3 and it's very well made. Thick paddings and a big pocket out front. I don't know if they make one for SD-1.
For my SD-1, I use Ketron's hard case with wheels. It fits the SD-1 snuggly and it's probably the best choice for it. It only weights 10 lbs.
Henry
[This message has been edited by Henry01 (edited 09-28-2001).]