FILE SERVER FIALOVER CLUSTERING

Hello Friends,

I am new to this forum and thanks in advance.Can any body give a solution for my scenario.

We have 3 independant file servers (smb shares) with windows 2008 R2 Ent.What My present problem is i have to make a failover clustering for these 3.Can some body  give me the right solution for this.

What should i go with 

By creating a single file for server with large storage or 3 independant failover servers for each.

Or 

By creating DFS name space and replication to failover server.I dont know how to do it .Kindly some body give me the best solution.

Thank you in advance for the best solution.