It looks like MAINGEAR and AVADirect.com are going to have to battle it out for the “world’s most powerful gaming notebook” title. Earlier today, we told you AVADirect is offering the Clevo M980NU, which supports quad-core mobile processors, two GTX 280M video cards, up to 8GB of 1333 MHz DDR3 memory, and has a 1080P 18.4-inch screen. Now, we’d like to spend a little bit of time on MAINGEAR’s new eX-L 18 laptop, which offers an Intel Core 2 Extreme CPU, dual NVIDIA GeForce GTX 280M GPUs, GPU Computing with NVIDIA