I am a noob when it comes to PC and im going to buy one this week. I have been lookng at many diffrent PC's and i think i found one i like. The specs are i5-3570k , Gainward GTX 680, 16GB Crucial BallistiX Sport and Corsair CX 750M. The only thing i dont know what to do is decide from is the 2 motherboards MSI Z77A-G43 and MSI Z77A-GD55. The only thing i know is diffrent about these 2 is that the GD55 supports SLI while the G43 doesnt. Are there any other major diffrences or is the GD43 a good and safe motherboard?