How about neither?
I've bought licenses for both arkeia and for BakBone.
Spending more money than I want to admit. Right now i'm running http://www.ahsay.com/
and is very happy with this. It supports mysql backups and normal file backups.
Why is this so much nicer than other software i've worked with? It boils down to two things.
1) not using virtual tape libraries and stuff like that.
2) reporting, reporting, reporting. This software will actively tell you through email how everything is.
For every backup that is made it'll send an email report telling you the state of the backup. It will also do so for failed backups and for backups that didnt run within the scheduled time.
I believe every backup software will have its own set of flaws, ahsay has a couple However, you are alerted with regards to them so they do not scale to become a disaster.
Also, given its price range its very affordable. If im not mistaken (running a leased licensing model), this software will cost you about $100/month for your 30 servers.
Maybe you dont like it, but in my honest opinion you should atleast give it a go.