Here are some pictures of the old Dell Latitude C610 next to the new Dell Ispiron XPS. Click on the thumbnail picture if you want to see the full image.
Top View - this shows how much bigger the XPS is than the C610 for height and width. Going to be a little more to carry around.

Back View - this shows how much thicker the XPS is than the C610 as well as the additional ports.

Front View - this shows the screens open on the two laptops. The XPS is 15.6 and the C610 is 14.1 screens.

Power Adapters - Check out the size of the power adapter! I think I'm going to order another one to keep at work...

So far I am really impressed with the performance of the XPS. The screen refresh rate is fantastic. It even opens Outlook 2003 as fast as a normal application opens (the C610 took a little while to open Outlook). Testing out the battery life this morning, which I am only expecting to be around an hour. I know, bummer 1 hour -> but the thing has 2 or 3 fans in it (not sure yet - but it doesn't get hot)