$700-$900 non-gaming computer PLEASE HELP!

Approximate Purchase Date: 1 Week

Budget Range: $700-$900

System Usage from Most to Least Important: Software like AutoCad and basic computing but can handle games if needed

Parts Not Required: keyboard, mouse, monitor, speakers

Preferred Website(s) for Parts: Hopefully canadian but will convert, will be buying from newegg but again will convert.

Country: Canada

Parts Preferences: I5 ivy bridge

Overclocking:No

SLI or Crossfire: NEEDS TO BE ABLE TO RUN 3 MONITORS, SLI OR NOT.

Monitor Resolution:1024x768, 1280x1024, 1600x1200, 1680x1050 any

Additional Comments: Needs to have windows, be able to withstand the ages (hopefully lasts and stays current for my basic work needs for time to come).

THANK YOU SO MUCH FOR YOUR HELP ANY SUGGESTIONS IS APPRECIATED.