Need Advice for Backup Solution

what would be my best value given my situation–

i mainly backup shared drives–the biggest of which is 100GB–total data backed up per night is around 500GB. everything is backed up to server hard drive.

i’ve been using scripts to copy, but am looking for a more reliable solution.

i’m having trouble navigating the big players’ sites, as everything seems geared for me to call and talk to a sales guy. don’t want to do that.

any advice on which solution best fits my situation would be greatly appreciated!