Need help/advice on <$800 Budget PC

All suggestions welcome. If you do not like any of my suggestions, I am fine with that, just post your owns and tell me why yours is better. Thanks for the help.

Approximate Purchase Date: Preferably before the end of this year.

Budget Range: Preferably less than $800 after rebate.

System Usage from Most to Least Important: programming ,surfing the internet, gaming

Parts Not Required: None.

Preferred Website(s) for Parts: None. I use amazon and newegg because I don't know much on sites where I can get parts, so if you know any, feel free to suggest.

Country: USA

Parts Preferences: Any parts that are known for having high success rate/low failure rates and are good price for the parts.

Overclocking: Maybe.

SLI or Crossfire: Probably not.

Monitor Resolution: No preference.

Additional Comments: Not really picky about that parts. I will be using it mostly for everyday use such as programming, surfing the internet, playing games, etc. Please include a wireless card. I will/would like to run Linux along side Windows as I will be programming alot in Linux. Make sure you keep it under $800, preferably ALOT less. No lagg is very important. All suggestions welcome. The more suggestions, the better. Include any preferring if possible, if not, that is fine.