I'm thinking about upgrading my Phenom II X6 1055T to an Ivy Bridge I5. I was looking at the 3450. I have three questions. One, will an i5 3450 overclock well, 2, is it a worthwhile upgrade and 3 what is a good, budget Ivy Bridge capable mobo?
To be honest, it's not really worth the upgrade unless there is a specific feature you are interested in on IVB. The i5 3450 has a locked multiplier so it will not overclock well.
I would say to save your money and by an SSD.