Oh, and another thing. That first picture in the products section of the computer and monitor needs something else to it. You might try a more high tech slick looking case and maybe some badass speakers positioned around it. And if the mouse and keyboard look cool, put those in too. If you ahve a black monitor or neon lights for the case that would look good too. For me, these small subtle details really helped out a lot.
Another thing is, Dell and Alienware and other computer retailers have a custom computer maker thing. If you could set that up and charge an extra fee that would be great.
What you need to do is appeal to all types of consumers. In order to get the uneducated computer buyers you need an extremely flashy and good looking site as well as set packages which are explaned, I think you've accomplished that. Then there are the consumers who know about computers and what they want to buy. For them, you need to present custom computer options in which they can tailor their PC to their needs. In some of your packages, these people will not care to have a 120 GB hard drive if they just need to play games and other elementary tasks. That is where people will be tyring to save money and you need to present options.
GOOD LUCk!