I am in the process of building my first PC, looking for highest quality components...I want to use primarily for gaming and multimedia...thing is I'm not sure what the advantages of LGA 1366 and 1155 mobos
1155 is a future proof as you can get right now. Unfortunately, intel is at a point in their development cycle that we will 'probably' see a new socket introduced for the next big cpu rollout - although nothing's been made official to the public about that.
Guess I stand corrected. 1150 will be the new socket for Haswell it seems.