I've personally gotten the impression that Tulane is very reputable, especially in terms of Latin American art history. My professors recommended the program to me when I told them I wanted to specialize in contemporary Latin American. On the program's FAQ they claim to not keep stats on where their students go, but say they've had graduates get into PhD programs at Princeton, UCLA, UC Berkley, Yale, UT Austin, etc.--in reputation those are comparable to what UMass Amherst lists, and that's a program I've heard many people say is great for PhD preparation. I haven't spoken to any current Tulane students or alumni though, so that's all the info I have!