Will,
I really think you should go no smaller than a Nova 5, reason...
I had pair 391's (in tupperware which was smaller than pelican), wal mart lith ion, UA-5, 2 jb3's, vert bar, clamp, and 15' mini star quad, and two sabra mounts (easily collapsable) and it barely fit in the bag. You will have much more stuff, but with some creative packing you should be alright.
For the UA-5 get a white metal shelf that they have for kitchens, the ones with the screens really cheap. Bend it around like a cage so you can leave the optical cable and the RCA's in the back, then get right angles and leave the front plugged in.
Search Target Rack for what I am talking about.