There is nothing wrong with the Western Digital Caviar Black WD1002FAEX you are looking at in my opinion. It just has about 30 megabyte per second lower transfer speeds than the Samsung Spinpoint F4 drive.
However, I believe 750 gigabyte and lower capacity hard drives are generally more reliable than the 1 terabyte and larger drives.
(This obviously varies with different models of hard drives.) The more storage space the more likely something is to go wrong. I could be wrong with this, but it is what I have come to the conclusion with according to what I have read.
If I were you I would get the afore mentioned Samsung F4 and another drive for storage. I think every desktop should have two hard drives. It makes it very easy to backup valued data.
This drive also looks very reliable for a storage drive:
Western Digital Caviar Black WD6401AALS 640 gigabyte 7200 RPM Serial ATA Hard Drive - $60
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136319
Edit: I think you should ask what computer case you should get in the "Computer Cases, Power Supplies and Cooling" section. You are purchasing a thick video card correct? I do not think any of the cases will fit the large card you are looking at. I have never dealt with buying a case for an extra thick video card.