Yeah, a duo at 2.0ghz sounds good for a laptop. The last one I've seen had a 1.6 single...
I don't look at laptops to often, but for what you're wanting, that laptop looks damn good..
15.4-inch WXGA (1280 x 800) CCFL TrueLife (glossy) screen
2.0GHz Core 2 Duo T7250 processor
2GB DDR2-667 SDRAM (up to 4GB DDR2 SDRAM available)
120GB 5400 RPM SATA HDD
8x Dual-layer DVD±RW drive
Video: Intel Integrated Graphics Media Accelerator X3100
Wireless: Dell Wireless 1390 802.11g Mini Card
Mobile Broadband: Dell Wireless integrated mobile broadband mini-cards Sprint and Verizon serice
Colors: Multiple colors and finishes available
Media Card: 8-in-1 flash memory reader
Input and Output Ports: 4 USB 2.0, HDMI, VGA, IEEE 1394a, RJ11, RJ45, 2 headphone, 1 microphone, 1 ExpressCard 54mm slot, 3 mini-card slots, consumer IR, S-Video
No webcam (optional Integrated 2.0 megapixel webcam available)
Windows Vista Home Premium
The one thing is it has Vista.. I would look at maybe a gb or two more ram..
But like I said, for what you want that should be good... But I'm not saying there isn't better stuff out there for cheaper. I would personally go with HP, because I have messed with alot of dell laptops that the owners haven't had to good of an experice with... but that's what a warrenty is for