Which Dell is Better for Photo/Video Editing?

Don't know much about computers so I'm seeking your input. My local Sam's Club is selling these two units, but I don't know which one's better for my photo editing (CS4 and LR 3), video editing (Pinnacle Ultimate 12) and of course the usual Internet and emailing and so on. No games. My top budget is $800. Thanks.

1) Dell 15.6" WLED Notebook ($798.91)

Intel Core i7 2640M Processor 2.8GHz
6GB SODIMM RAM
500GB 7200RPM Hard Drive Serial ATA 7200 RPM
15.6" display (1366 x 768)
NVIDIA GeForce GT 525M
Windows 7 Home Premium 64-bit

2) Dell 15.6" WLED Laptop ($697.00)

3rd Gen Intel® CoreTM i5-3210M processor, 2.5 GHz
8GB DIMM RAM DDR3
1TB HD (5400 rpm) HD Interface Serial ATA
15.6" display (1366 x 768)
Intel® HD graphics 3000
Windows 7 Home Premium 64-bit

The first one. Video editing will use the extra cores in the i7, it has an nVidia video card which can sometimes help accelerate things, and it has a faster hard drive. You can always add more ram, and replace the disk with an SSD later if you really want to.

If you hadn't said video then I might've said get the i5, just because it's newer.

Of course a desktop will be even better. It may cost a little more, but it'd faster and more expandable.

Thanks, Tim. I do my editing on the run so I can't use a desktop, unfortunately.