The batch file is nice, but it depends on your usage. Do you just want to be sure things you've previously deleted can't be undeleted, or do you want an emergency disk for 'panic deletes'. You know the kind, you've got 30 seconds to delete things UNRETRIEVEABLY before the men at the door break it down.
In that case, I'd stick with DBAN. Keep on on a flash drive or CD, set your bios to boot from that option, and run it in quiet mode. Install your media, reboot, and stand back.
I've not had to use it yet, but its nice to know I have the option.
Also, set up an old PC and practice using it if you can. Don't want to be fumbling with readme.txt in a crisis situation.