So, it looks like al Queida’s best friends are looking at buying an additional 72 F-15 Eagles, and the word is that they are very interested in the modified reduced signature (stealth is way to strong a word here) F-15 SE.
If they do, it will likely be instead of purchasing the F-35 Lightning II, and a quick perusal of the Wiki shows that nothing is moving there yet.
What the F-15 SE brings to the table for the Saudis is greater speed and payload at the expense of having a larger radar cross section.