Assuming you're looking at 1:48, I'll add my vote for the Revell F-15E. It's a great kit OOB, builds into very accurate model, and you really can't beat the price. It would be a good choice for your first Eagle.
Academy's MiG-29 is a solid, buildable kit, but suffers from a host of inaccuracies. You could build it right out of the box with a little tuning and have a decent model (you know, it
looks like a MiG-29). Some AM would help with the cockpit and burner cans, but it will still need work on the nose shape and loadout. If you're interested in doing some work on the kit, take a look at
this.
I know you didn't specifically mention F-16s, but if you're looking for great kits OOB, the 1:48 Tamiya Vipers are hard to beat. If you're not dead set on the MiG or Eagle, you might want to check them out.
HTH.
-YL