When it comes to umpires, the ones that are in the Hall of Fame, many have their rookie/only cards in this set from their umping days.
http://www.psacard.com/psasetregistr...on.aspx?c=1516
I think the only guy you have that's on the list is Al Barlick, and that card looks pretty sharp and nicely centered. I would expect a 6 or 6.5 I think on that one. Your Paparella looks to have a stain or mark on the back top right corner. Other things I would worry about are the centering both front and back. Like your Rommel or Napp might get MC/OC qualifiers due to the back of the card, since there's not white border around the black box or peach box, from what I can see.
You may want to get a subscription to vintagecardprices or worthpoint to see what high grade examples of these have sold for in the past, but here are representative numbers from the SMR:
HOF Umps
5: 40
6: 65
7:110
7.5:140
8:235
8.5:365
9:825
Non-HOFs
5: 13
6: 20
7: 35
7.5: 50
8: 90
8.5:145
9:415
So I would definitely send the Barlick in, and if you have a Chylack, Conlon, or Hubbard, the same. The others ones would need to be NM-MT 8 or so to have good retail value for your grading. That's why I wouldn't send in any that are MC or OC. This set has tiny borders that will skew the off-center numbers more easily than most sets. The Gorman, Bellenfant, and Engeln picture all three look OC/MC.
http://www.psacard.com/Articles/Arti...dered-beauties