I have a long bed Viking Sapphire. I broke down and bought the Tutto bag for it, but I feel very comfortable taking my machine out of the house. I've spent about 10% of the value of a musical instrument for a road case for it (like $250 for a flight case for my keyboard, and a few hundred for a hard-shell case for my cello), so I didn't mind spending about that much for my sewing machine.
http://www.tutto.com/16h_monster.html
I also like that it collapses to a skinny little thing for storage!