This topic seems to come up pretty regularly, but I don't think I've ever chimed in...

I think Jabots are fine with the right jacket or doublet - I've never thought they look very good with a three-button waistcoat.

Ascots (or riding stocks) are a good alternative to the Jabot for doublets like the Sheriffmuir and Montrose, or with other high-fastening jackets (like riding coats).

I draw the line at cravats, and am not much of a fan.

I plan to pick up a jabot and will use it when I'm feeling especially flamboyant, but I generally prefer a simple self-tie bow tie in black or white, depending on the level or formality.