I couldn't remember what things you miss out on with Sandy Bridge CPU. I think this is a more or less compete list of IB advantages:
(1) PCI 3 support; by the time this becomes an issue I'll upgrade.
(2) uses less power at stock speed. not an issue in desktop PC.
(3) Better integrated graphics. Don't care; I'll have a discrete GPU.
(4) Better security. Can't get excited about this.