Help me choose between 3 RAM modules.

The first one would be better as it is cheaper than the other two, and as it has 2133/CL9 specs, it beats the 2400/CL11 and 1866/CL9 specs on the Corsair sticks. Basically, you're paying a premium and sacrificing timings for looks if you go with Corsair.
 

I selected 2133/CL9 RAM. You chose 1866/CL9 RAM. Mine is faster while remaining at the same CAS latency. Plus, mine has removable heatspreaders:)