IMO no hard drive is clearly better than another -- just get the cheapest drives and KEEP THEM BACKED UP!
DIY/Beginners area is here:
sticky-important-topics-beginners-please-look-here-first-f16.htmlIf you want a second opinion on the drive, you can send to me in LA. If I can recover the data, it's $300 -- if not, no charge and I can refer you to another company (but you're looking at ~$1245 probably). 300dollardatarecovery.com
BTW... Unless you know all the ins and out of RAID, instead I recommend just cloning or backing up your drive to a second drive. RAID is cool, until it goes down. Just cloning the drive to another drive is easier IMO.
-Brian