..Quick update: I just did some searching on both Thule and Yakima's web site for what they have for roof racks like suggested earlier. Suffice it to say, what I found there confirmed I'm making the right decision, going with a hitch mounted rack. :)
Yakima didn't even have anything that'd fit our Fusion for a roof rack. Based on the pricing I saw of their roof racks, and of the ones that Thule offered....Wow, expensive stuff! Hitch mounted rack will be several hundred $$ cheaper, even including the cost of putting a hitch receiver on the car!
Will