Need a program recommendation....

I have two external USB drives; an 80gb with about 8gb free, and a 100gb with about 35gb free. I plan on getting a 250gb external and copying both drives to it, and then I'll format the two smaller drives, with the 80gb going to a good friend of mine. So, can someone recommend a program to copy all the data to the new 250gb? I know I can dragondrop it using Windows Explorer (or any other explorer) but it is generally slow and if any type of error comes up, the whole process stops, plus there's the questions that pop up occasionally that prevent a complete unattended copy. So I'll probably use Unstoppable Copier (available here http://www.majorgeeks.com/download2623.html) unless someone has something else they'd recommend....
THANKS!

 

Unstoppable is great I use it a lot if any one knows of any thing better i would love to here it too.