Spreadsheet: Best RAID5 array for your dollar

I see many people come here to read this post about choosing the best size hard drives for your RAID5 array: The best value hard drive for a RAID5 setup

The prices I gave as examples are already out-of-date. Here is a link to the spreadsheet so you can put your own prices in and make your own determination on what size is your best option.

By the way, these enterprise class hard drives are perfect for RAID arrays:
Western Digital RE2 or Seagate Barracuda ES

Spreadsheet available here: link