michaelr8709 :
Roland Of Gilead :
Compatibility wise it will be fine. However, often the PSU in Dell systems aren't the best, or have limited output. You are changing a 65w part for a 95w/105w parts. Your PSU needs to be able to take that. And whatever you do, don't try and OC the new CPU until you get a new PSU too.
What is a good PSU to get the most value for what I need for the smallest price?
Well, something like a CX550m would do fine. But 10tacle has a good point. As he said, and I eluded to, Dell systems often use propriatry parts, and the BIOS can be hobbled, so upgrading 'can' be difficult. Not always though, and I doubt it with that mobo. But defo, worth checking first before moving forward.
Also, even if that all goes well, you will need to make sure to update the BIOS to a latest version (Providing Dell has one for the new CPU line) before you put in the new CPU.