To preface my inquiry, I posed a question to the community 3 weeks ago regarding choosing replacement computers for my office of 60 users and had an amazing response. I ended up purchasing 60 HP Business class workstations that I'm really happy with thus far. I'm hoping to get some insight into the processes that others use to clone indentical computers.

The specifics are as follows:

I have 60 identical Windows 7 machines that will be replacing the current machines within my office. 

I want to create 60 identical computers with the same Windows 7 configuration, software and settings. These new machines have unique keys (Office 2010, Windows 7) as I don't have a site license with 7.

I've looked into some open source and licensed cloning tools (Acronis, Symantec Ghost, Clonezilla, etc.) but I would like to hear some feedback from the community regarding recommendations.

Is there a tool in which I can setup one drive as master and clone the other 59? Is it possible to change the keys after the cloning? - and if so, what would be the most efficient method?

Any other input and/or direction would be sincerely appreciated.