MSI does not directly sell the laptops: so they make them in a few closed configurations that can be found in many stores, but some vendors can customize it if you would like to upgrade any components. Availability depends on model and country, follow the links to find some options sorted by country:

• MSI GT663: 15.6-inch, Nvidia GeForce GTX 460M (not yet available)
• MSI GT660/GT660R: 15.6-inch, Nvidia GeForce GTX 285M
• MSI GX660/GX660R: 15.6-inch, ATI Mobility Radeon HD 5870