Regarding reliability of RAID 0 and the risk of losing data. Yes, 2 drives statistically increases chances of losing data.
But remember, 2 drives or 1 drive depending on what setup you use, if a drive fails, it fails. Regardless if your using RAID 0 or not. And you should be making backups of your one drive setup just as much as a 2 drive setup etc (for example).
In keeping with the "I make regular backups" idea. Yeah, I love RAID 0 and would recommend it. But then again, I havn't had any problems and make regular backups, so i'm biased ;-)
If you got the cash, go for it, doesn't hurt to try it yourself. Just backup ! Backup ! .......