I have a Dell Inspiron 15.6" 1545 Laptop

Preferred specs:
Processor: Intel Core at least 2ghz YES
Operating System: Windows 7 No, Ubuntu 10.04
RAM: prefer 8gb, 6 is fine No, 4Gb
Display : 15" preferred Yes
Hard drive: prefer 1TB (ssd not required)Sadly Lacking, 160Gb
Graphic card : Radeon HD 5470 Graphics or similar Need to check - currently away from home. Can have it in a PM tonight
An optical disk drive (blu-ray not required) Optical disk
Memory card reader Need To check, as above
USB 2.0 ports Yes
Ethernet port Yes
Wi-Fi Yes
HDMI Need To check, as above
Built-in microphone Yes
Built-in stereo speakers Yes
Web-cam prefer Yes

Doesn't meet all your specs- but if you're interested PM me