Both would be funny as ****. On one end you will have booradley commit suicide, and on the other end, you'll see the entire island of puerto rico crying in such dispair, similiar to when Sal Sanchez destroyed Wilfredo Gomez. Would be a blast if both could pull of the upset, but i dont see it happening, i'm afraid.
Chavez over Pavlik would be a much bigger upset. If Marquez wins, it means he hasn't degraded as much as people think. Dude was top 10 P4P not long ago, and only dropped out due to inactivity. He hasn't had a stern test since Vazquez III, and he hasn't looked completely shot, so who knows how much he has left?
Marquez is past his prime, but he is still very dangerous and a proven champion, so if he beats Juanma it wouldn't be much of a surprise for me. If someone as unproven as Jr beats Pavlik, that would surprise me more. Pavlik is on the downslide, and Jr with Roach does have a chance to beat him, but I think it is more of a longshot than Marquez over Lopez,who's been there done that.