Just a few months ago, full RGB mechanical keyboards were rare beasts, and the inclusion of full per-key RGB lighting commanded a very high price, with some keyboards selling for almost $200.00. Now, prices are coming down rapidly and vendors are starting to compete on features, but how many more features are there left to add? Today Benchmark Reviews looks at the latest entry in the ?full color per-key RGB keyboard? market, Thermaltake's Poseidon Z RGB Mechanical Gaming Keyboard.