Setting up my first SQL Server cluster
If it's a new deployment then why not upgrade to the latest version of the software? 2014 has many benefits over 2008 and 2012.

The install is simple if you have configured windows clusters before. I would recommend windows 2012R2 as clustering is a little easier with features like network teaming and the automatic quorum level settings.

One of the hardest things to get right can be the LUNs that you configure on the SAN especially if you're using SAN level snapshotting.