I am about to purchase an ASUS Lamborghini VX6 net-book, and i am not sure what upgrades to purchase for it. I am purchasing the computer off of www.Xoticpc.com, mainly because it has it for a good price, and seems reliable. On the website, it has a list of available upgrades. I am not very computer savvy, and i am not sure what most of these things mean, or if i need to upgrade from the standard. Any help would be greatly appreciated! There is a list of options for upgrades. The list includes upgrades for:

Thermal Compound
Ram space
Primary hard drive
External usb optical drive
Back up software
Memory card reader
Sound card
Fingerprint reader ( Particularly interested in what this is)

Again, any insight into what these things are, and if it would be detrimental to my overall experience with the ASUS Lamborghini VX6 if i didn't upgrade would be appreciated!