After reading up for awhile about how most of the blue filters are not correct,It has came mind lately. Which would give your better results a colorimeter or the filter?

It depends.

First, a blue-only mode is preferred.

Then move on to your other choices:

It is very simple to check whether a filter works by looking through at yellow or at red or green and seeing it that patch matches black. If it does match black, then the filter is effective for that display and it is the same as a blue-only mode, and fully accurate for setting color. Use the filter as it is simple and extremely effective.

However, if the filter leaks, then you can use colorimetry equipment to set color. However, you have to be able to measure accurately the xy coordinates of your primaries and white point, and calculate the resulting Y values for each in that relationship. To do this, you can do all the math yourself (way too complicated to explain), or just use Greg Roger's handy calculator, found here:

http://www.accupel.com/HDG4000_manuals.html

Using colorimetry equipment is much more complicated to explain to a DIYer, and hinges also on the accuracy of the tool, so I would be tempted to prefer not doing in this way unless 1) the filter fails and 2) you are pretty comfortable with fairly advanced calibration and your meter is trustworthy on your display.

There is also the Monster test disc which can help you set color saturation using the fleshtones of the three ladies, which is probably the simplest DIY solution for people whose filters aren't effective on their display, and who don't have the understanding or the equipment to use the colorimetry method.

Chris doesn't calman tell you if the Y level are off?

And is there any way to simulate the blue only mode?