Should I buy the Dell XPS 1330 ?

The Dell XPS M1330 is a pretty good laptop. All the specs are good except for your video card. It only has 128 MB of memory, you would need a better one for gaming. But, it will be able to handle everything else. As for the Asus G1, you would need to give more details about it. My recommendation is that you get the larger XPS M1530 instead since it has the 256 MB video card which is a little better for gaming, it will cost about the same as the XPS M1330. For internet security, you should avoid Norton and get either Kaspersky or McAfee since they have better features and are easier to use.