Help me choose a hard drive

I have an early dual processor 2.0 G5. I am using two Maxtor 500 GB drives in a RAID configuration. I have been experiencing a lot of data loss, for example entire iTunes albums disappearing. Disc utiltiy finds problems every time it runs, thinking the drives are going bad. Might be because even in RAID 0 I only have about 50GB of free space. I want to replace them both with 1TB or 1.5TB. Looking at the following:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136151
and
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148337
pros and cons? Any other drives I should look at?

Never let a 465GB drive get below 10%.
Reformat every year.
Run Disk Warrior regularly.
Make sure your memory isn't writing garbage.
I would still stay away from Seagate, unless buying from OWC which updates firmware if necessary.
These are my two favorites for now (can't afford the 300GB WD VelociRaptor).
http://www.barefeats.com/harper14.html
- these are quieter, fast, and cheap $76 ea. I have four of those along with a couple WD Black Caviars.
http://eshop.macsales.com/item/Western%20Digital/WD1001FALS/
http://www.tomshardware.com/reviews/hdd-terabyte-1tb,2077-7.html
Another good chart showing drive performance:
http://www.tomshardware.com/charts/3-5-hard-drive-charts/Average-Read-Transfer-P erformance,658.html

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