if you are upgrading ivy or sandy, then it is much better value to go to an i5/7 2/3XXXK, than a complete platform upgrade, the performance increase may not be worth it. However, it's getting to the time when 1155 mobo's are going to start dying, (my NIC needs an uninstall/reinstall cycle every few days, else it's just not there). So providing you accept that you won't have the latest features, you may not have PCI-E 3.0, and you may have to upgrade again in the next 6-12 months then yes they are a great buy. I'm on a 3570k, so there's nowhere for me to go, but i3/pentium users, the i5's and i7's are a simple update.