Curious about how reporting to credit bureaus works with cards that do not report a credit line (like visa signature and AMEX "no preset limit" cards.)

I am going to be making a fairly large (for me) purchase within the next couple months. This won't fall into any "bonus" categories nor is it available at any bonus malls - so I'm stuck deciding which card to use.

Would it be best to use a card that does not report a limit? Would this long term help my credit / debt ratio, since it would be obvious your credit is at least at that high mark?

I am choosing between SPG Amex (which has a standard CL that is high enough to handle this charge), PRG Amex (No Pre-set limit), and Chase Sapphire Preferred (Visa signature that does not report limit, and has a "flexible" limit). My initial inclination was to use the SPG Amex because I value the SPG points, and because AMEX is pretty good if there are ever problems, but then I started thinking about CL and trying to improve credit / debt ratio.

Any thoughts? Anyone have experience with how the credit bureaus handle this sort of thing?

Thanks and sort for the long post!