Professional Color Correction Monitoring

Using Premiere CS4 (I'm using PC) how can color correction work be properly (& professionally) previewed on a monitor?

I have no additional editing hardware, just the software. My current setup are two LCD monitors and sometimes I use the full screen output to view the edit using a DVI to HDMI adapter for a large LCD TV. I would like to purchase extra hardware to do color correction and am thinking about the Matrox MX02 mini at the moment, partly to save the expense of a proper broadcast monitor.

I've read online that professional broadcast monitors have a color temperature of 6500K and consumer monitors a temperature of 9300K. Is this true? And if the color correction work is being done on a monitor of different color temperature to that of the audience, I'd be interested to know why?

Thank you.