Years ago I worked at a car dealership in St. Louis for a summer, and there was a similar ongoing debate about what the plural of "Lexus" should be. Despite solid arguments on all sides, the matter was settled when one of the most colorful salesman on the lot (as judged by the pants he wore) once said of a hauler full of them was being unloaded...
"Look at all those pretty Lexums!!"
Iamironman - I'm glad we have an English major on the board! I'd hate to think my fully-proper use of hyphenated compound modifiers was going unnoticed.