Basically, the 7200rpm drive blows everything away. Faster speed is
almost always going to blow a slower drive away. The faster rotational
speed = faster read speeds off the disk media = faster performance and
data transfers. Lower latency also increases performance as well.
I'd go with the 7200rpm drive for sure!
Also, see www.fatwallet.com/forums/ -> hot deals and www.techbargains.com for the recent dell.com sale on these HDs (down to
~$155?) and if you're smart, get a coupon first and bring it down even
more (eg. ~$120 or so with a good Dell.com coupon). See coupon threads
and dell.com threads in fatwallet.com/forums/