I am currently staring at 2 systems (part lists). One has a GTX 770 and a Mobo and PSU that will not support SLI while the other has a GTX 760 and a Mobo and PSU that WILL support SLI. Now my question is do I go with the system that has more up front power with the 770 or do I build the system which has a clear upgrade path? All opinions welcome!