Is it possible to safely monitor good colour correction using BM Intensity?

Is it possible to safely monitor good colour correction using my output of my Black Magic Intensity Card? It has an HDMI out so Im thinking there is no need to go to an external VTR and then into a Monitor. Also, I cannot afford an HD monitor.. not even close! SO im thinking to use a 1080p Samsung computer/TV monitor. I hear for the money they make excellent (budget) monitor substitutes?!
OR maybe just buy another Apple 23" HighDEf monitor?
FYI: I’m using AVCHD & HDV , encoding into ProRes and ProRes HQ.

This question keeps coming up in different contexts, with a variety of answers. Correct color depends on correct calibration all the way through the chain from digital signal to playback. No single hardware piece can do it all, even a perfect monitor, without calibration.
As JP correctly states, Rec709 is the standard for HD, Rec 601 for SD. These standards define the color temperature of gray, 6500 in both cases, and the specific color of the primary that generate the 6500. The 6500 needs to be generated correctly at all gray levels from 0 to 100 IRE.
In addition, the luminosity needs to track the 2.2 (or 2.5) gamma curve closely.
Lastly, the monitor needs to have 0 overscan, and high enough resolution to clearly see the finest resolution the input is capable of.
Some of these adjustments can be done by eye - most require a spectrophotometer of some kind, and a monitor that has all the adjustment capability to perform the adjustments.
The best way to make these adjustments is in hardware, but in the cases where this isn't possible, it is possible to generate a color look up table (LUT) to compensate for some, but not all errors. Apple's colorsync is such a LUT, although it cannot adjust for the primary colors, it can do gamma and the 6500 balance.
More of an answer than you wanted I know, but that is just the way it works.
You can have less expensive equipment give good results with proper calibration, and the best equipment uncalibrated provide terrible results.

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