Reliable broadcast colors possible?

Hello everyone,

about to add some more confusion to the neverending story of broadcast safe colors.

Just to give some background info for my question: I work for an animation company, we only deliver digital material to post houses which do the conversion to tape. So I don't need to worry about making the video signal broadcast safe, but I'd like to make sure that there are no huge color changes from what we deliver to the final broadcast.
We don't have the hardware to check actual video levels (yet), and it seems that getting this equipment just to be sure is unnecessary.

In search of a reliable software solution I tested the broadcast color correction of Shake, After Effects and Color Finesse, and they all flag different colors/ranges as inappropriate, with Shake complaining about the least, AFX correcting pure magenta which CF doesn't do, and CF correcting pure blue which AFX doesn't do. The settings were the same as far as possible.

I know that none of them might be perfect for correcting colors, only for identifying which colors have to be corrected. But can anybody say which of them, if any, does that reliably? Is there some other software to look into for this? Or is there no such thing and we do need to get a vectorscope after all?