PC Apex has rethought their PSU calculator, and updated it to include some of the newer components that have come out.  Pick it up as a quick way to judge if the PSU that comes with the case you have in mind is enough to power the peices you want to put inside.
“Version 1.2 of the PCApex PSU Calculator is up for free download (no registration required!) and is a detailed system power use calculator for determining how large of PSU you need. This app will let you know how large of a PSU you should use to ensure your system runs as stable as possible and is not meant to accurately measure how much voltage your current system is actually using but rather will calculate a “worst case scenario” for how much power your system may use.”

Here are some more Cases & Cooling reviews from around the web:

Click Here to go to Cases & Cooling   CASES & COOLING