Laptop hard-drives are slow, SDTR even on 7200rpm units is
still behind a typical Barracuda (7200rpm). Desktops can also
use 10,000rpm drives like the WD Raptor - a 2.5" 10k-rpm does
exist but it is SAS/FC re Seagate Savvio SCSI unit (non laptop).
That said, I don't think the laptop will be the bottleneck:
o At least you propose a 5400rpm unit as the bottom end
o However, is the difference between 120GB v 200GB material?
If the data is important, you need a backup - so there is another
consideration of actually backing up the data on the laptop. If it
has to go away for repair, you need to backup your data.
Therein is another key point - warranty, choose carefully.
So on priority I'd put it as:
o Graphics card
o Processor - Centrino
o Hard Drive
Screen size is also a factor with graphics card - going for a very
high resolution screen puts higher requirements on the GPU.
www.dorothybradbury.co.uk for quiet Panaflo fans