Hypersonic GX7 comes out $500 more than PCTorque's 8790 Configuration. $500 more is a lot more money. HOWEVER, if you go to the configuration screen on GX7, it says, and I quite "User Upgradeable Pentium® 4 Processor". If you look on the main screen for the GX7 it says "user upgradeable GPU" with a footnote that says "3. Hypersonic cannot guarantee the availability of GPU upgrades. Professional installation may be required."
Interesting. For $500 if I can put in a new P4, and get a video upgrade in a year or so (obviously it wouldn't be PCI express) it would be worth it to me. Plus the GX7 comes in a nice blue color instead of that bland god awful silver that the 8790 comes in along with every other George Bush voter's laptop.
While these claims may seem "exaggerated" or whatever, with Hypersonic's extremely high reputationhttp://www.resellerratings.com/seller2081.html
I don't know that they would give inflated, exaggerated claims and risk their reputation.