Z77 is the best chipset for intel 1155 socket. However, sabertooth amd isn't my specialty, I go full intel. I believe though that the 79 is a bit more expensive, but the 77 is the most bang for your buck and fits just right in with your current specs.
---------- Post added at 10:29 AM ---------- Previous post was at 10:27 AM ----------
I also saw the LAN problem, then I would go with the p8x77-v pro as it has built in wifi. I would go with a i7-2600k instead of 3770k ivy bridge. This is due to the fact that you pay about 30 bucks for only .1 ghz. That is the only difference.
Pity the living, not the dead. We never know who else we must let go.