ok! you're case is 8.1 inches wide so it can accomodate the 160mm high tower style cpu heatsinks.
Here is a link to a recent Tom's Hardware article with useful information about 10 popular cpu heatsinks:http://www.tomshardware.com/reviews/lga-1156-heatsink,2535.html
I know the article states Intel LGA 1156 heatsinks but just about all of them are also compatible with Intel LGA 1366 cpu's
Here is a link to a very good web site with more useful information about cpu heatsinks that will help you make an informed decision: http://www.frostytech.com/top5heatsinks.cfm
You can use the Google embedded search feature at the web site to find more information about heatsinks for specific cpu sockets.