I have used a co-workers Global, and personally wasn't happy with it, as the metal is way too soft. I think it would be ok for home use though.
If you want quality and cost is not much of a concern, get an "Aritsugu" or "Masamoto" brand.
http://korin.com/Shop/Japanese-Style...ore_Code=Knife
If you want the best, get the Kikuichi brand, although it seems like they don't have their high end line of knives listed on the English site.
http://kikuichi.net/
This is a good all-purpose knife for home use, and should be able to cut sashimi, as long as it is kept very sharp. You need a very sharp knife for cutting sashimi.
http://kikuichi.net/sujihikiv1goldal...fe27cm105.aspx