Thanks for the replies!!
Well I found the answers of the things I was looking for.
Now it is a toss up between these:
In 1 TB segment:
WD Caviar Blue WD10EALX (SATA 6 Gb/s,7200RPM,32 MB cache,500gb platter(2/4))
Vs
Spinpoint F3 HD103SJ (SATA 3.0Gbps,7200RPM, 32MB cache,500gb platter(2/4))...