I say redo it. Not worth trying to upgrade when quad core is out there. I redid mine in 09 and it runs awesome. Just too slow with all the bloated software over the last few years. Went SSD last year and it def is worth the upgrade. I still have buddies that use older stuff but when you do alot tasks on your pc and it's quick it's totally justified to spend the cash. IE. banking, online sales ads, pic organizing, research, gaming......