this MLU _may not_ be so speculative after all. i recall reading in the rag 'Combat Aviation' in the autumn of this year that the USAF is looking into the addition of a precision attack capability to F-15C/D's that are retained after the introduction of the F-22A [or should i say F/A-22A? as i think in the end the raptor will get some kind of attack role to].
there is a picture of an 18th TFW [as was} on the front of the 1/72 scale weapons set from hasegawa [that covered US cluster bombs] that was first released in the 1980's. this shows a F-15C with a loadout of M117's if i recall ok.
if you get this one done, i would go for something similiar to an F-15E, but paint it in the standard F-15D colors as they currently wear.
trevor