Although I won't be at the LA Regional, I'll still throw in some things about your booth. Feel free to ignore it, since I won't be there.
When I was a student, some of the coolest booths I saw were the ones that had products in action/demos to use, or had some cool details about the product. Sketches, CAD, cross-sections, etc.
Your audience isn't just PC enthusiasts, it's a group of engineers/STEM students. Most of us won't shy away from technical diagrams; they actually look cool and interesting to most of us! I imagine a water loop running, with some technical drawings (not your trade secrets, but general things) to also look at would be cool.
Material talking about how CoolerMaster needs mechanical/electrical/etc engineers in the future is always a plus.
Of course, mentioning how you have helped those 4 teams is always a good idea. Showing community involvement always goes over well.
Those are just my opinions, from when I was a student. Take them with a grain of NaCl.
PS- Maybe a team can lend you a spare motor and you can watercool it.
