I'm currently building a Revell F-15E and I have a Hasegawa F-15C in the stash.
So far the fit of the Revell kit is very good. The parts that give the most trouble are the CFTs. They fit great but there are some minor gaps along the very long seams. The join between the main fuselage and the cockpit section can be a little tricky, too. Just be patient attaching it and the seam clean up will be minimal.
I think there is a boxing out there that includes weapons but they are had to come by. You may need to get some AM weapons if you want to load it up.
I might start an In-Progress thread since I've been taking pics as I move along with it.