Well, it depends on how you are using your HDDs. Your rig is great, looks like it is set up for games?
The Western Digital WD Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive is one of my favorites. You will get ~125MB/s average transfer rate with it.
If you are using them for data storage, no, for OS and programs, probably so.
If you are looking for "fast", consider a smaller (256GB) SSD for your OS and programs. a new SSD will give you read rates of > 475GB/s, which the platter drives can't touch.