i like your SP. you've got some good hitters: vernon wells, michael young, arod, sizemore ... if prince and piazza / johjima can pull through and patterson steals a lot of bases, then you're looking good. yes, you do need to be reminded you need a closer. that seems to be your only weakness. you don' thave to get a closer, 2 middle relieves like a scott shields / mike gonzalez / raphael soriano / dan wheeler .. those types will work too b/c they give you a better chance at lowering your ERA
1st off try to cut your batter bench to just 2-3 players.
Yuor league seems to be more batter heavy, and i can see players being stingy with closers. Just keep a keen eye out for any sign of a solid closer coming up! Anywhos like above, i'd rather go with the MR option. I can see that dumping the SVs cat in a rotis league seems bad, but with so many other categories, you can definitely make up for it.
++LOOK AT YOUR COMPETITION! If all the other teams already have 3 closers each then i'd consider dumping svs. But if there is a team with only 1, then contend with that one for the extra point by picking up a closer then you surpass him when gagne come sback.