Oh, this is one of my dream-breeds!!!
They are just lovely companions. Yes, they do have a high prey drive. They get along just fine with other dogs though. They bond very closely with their "pack"/family. Very intelligent, very quiet. Somewhat aloof with strangers.
I'd say size-wise.....about Irish Wolfhound-size. (Ok, so not an exact measurement there.) All the one's I've met are just gorgeous. Not too terribly tough to groom.
edited to add: Here's the link you can check out. Might be helpful. www *dot* borzoiclubofam erica *dot* org (it won't let me attach the link here...how odd)