I've heard the Monogram Revell 1/48 F-15E is one of the best F-15 kits going these days, it also comes out under Revell Germany as well.
It got a good review in FSM last year and was the subject of an article about photo etched part application in last month's FSM.
I've heard Italeri's 1/48 F-15C from earlier this year is wanting in some repects, but its dimensions and shapes are good.
Outside of Tamiya's 1/32 F-15E (my wallet screams in agony at the thought of it[:0]
) those are the latest word I've heard in F-15 kits in a couple of years.