I just bought a laptop for college from Hewlett-Packard for that price range.
Right now they are offering free shipping on their HP Pavilion laptops which is always nice. I went with the dv5000z series.
The specs for the laptop I bought are:
Operating System: Genuine Windows XP Home Edition
Processor: AMD Turion(TM) 64 ML-37 (2.0GHz/1MB L2 Cache)
Display Widescreen: FREE Upgrade to 15.4" WXGA BrightView
Graphics Card: 128MB ATI RADEON(R) XPRESS 200M w/Hypermemory(TM)
Memory: 1.0GB DDR SDRAM (1x1024MB)
Hard Drive: 100 GB 4200 RPM Hard Drive
Primary CD/DVD Drive: DVD/CD-RW Combo Drive
Networking: 54g(TM) 802.11a/b/g WLAN
Primary Battery: 12 Cell Lithium Ion Battery
Warranty: 3-year HP Express Repair extended service plan
Here are the different HP Pavilions:
http://www.shopping.hp.com/webapp/shopping/compare_category.do?storeName=computer_store&category=notebooks/hp_pavilion&catLevel=1