If you want to mirror/clone/copy the entire hard drive, Acronis True Image software is what I use and reccomend to all my clients.  It's what most of the techies that I know use.   I make periodic full backups of the hard drive (all partitions) to a separate hard drive.  If there is a problem, either just a corruption or a drive failure I can rebuild a new drive back to exactly how it was at the last backup in about an hour. But, it really sounds like you have buyers remorse and it's OK - if you are in the US, you have 21 days from the date on the Dell invoice (usually the date it was shipped) to decide if you want it and if not you will have to call Dell and get a return authorization.
I have worked thru a whole series of problems on my new Dell XPS 8300, i7, 12 gigs Ram but I reach some I can't resolve. Your set up (Dell software) won't let me make a backup disk or mirror image on a DVD. It also won't let me make a duplicate of my C drive  (Maxtor software won't run under Windows 7 and apparently the Western Digital site for downloading their software to do the same actions is blocked). I will call tomorrow but if I can't get this issues resolved the whole computer will have to go back as a unit ( the light on the monitor is out/never worked and the USB 3.0 was not as order but these are solvable problems)   PhotoRoy9
Dell Software prevents Windows 7 from performing Functions