I'm looking to get a backpack to replace my Red Oxx Rockhopper.  I like the Rockhopper, but I need something that isn't a sling.  The primary purpose will be a sort of day bag for the Little Monkey and me.  That means 2 baseball mitts, a sweatshirt, water bottles, balls, snacks, and maybe a towel.  One of the Red Oxx rucks seems cool, but I also like the Synapse.  I think I would probably need the Synapse 25, but that seems like it would be too big for my short ass. 
  
What to do?