Jeff
I would recommend Carbon Copy Cloner, it carries out verification. It is donationware and all the features work in demo mode. I have been using it for several years and thoroughly recommend it. If you find it useful please consider donating. The program can be found at
http://www.bombich.com/ccc_features.html.
Are you wanting to copy the files once, perhaps to move to a larger disc, or for backup. If not for backup I would STRONGLY recommend that you setup a frequent backup procedure (sorry if my assumption about not backing up is wrong). CCC is one possible tool for doing this. I use CCC for copying disks and for system disk backup as it can create bootable copies, I also use EMC Retrospect for archival backup as it allows me to store snapshots that enable me to revert to earlier versions of data or software, however this is a more complex and expensive solution. I stress the need for frequent backups as I had the bad experience of a failed hard disc in my laptop and then found that my backup was two months old, this took plenty of time to fix although it would have been worse without any backup and I did have backups of my raw photos but lost some work done in Adobe Lightroom (the latest LR catalogue backup was on the same hard disc).
Regards
Nigel
PS I have no connection with Bombich software other than as a satisfied customer and yes, I have donated.