The best part about the bolt together rack is that you can buy an extra center section to make the rack longer, although at 200$, its probly just cheaper to weld your own center section and bolt it in to extend the length.

My main reason for getting this rack, besides the great deal Superacer gave me, was the fact that it is just as wide if not wider than the roof trusses that hold the mounts. It allows me to fit two kayaks side by side without them hangin' off each side haha.