"Nuts" might be too harsh; of course, you'd have to be the judge of that.
If you'd said you were two thirds of the way up Half Dome, dangling from a rope, trying to decide which of your three f2.8 zooms to use, and had that thought about a Nex 7 and two tiny lenses, I'd have said, "Not nuts."
But if it's a matter of walking over to a nearby vehicle to retrieve a camera, thereby having to carry an extra pound a hundred yards across a pasture...then maybe you're just having a spasm of Gear Acquisition Syndrome. Take a couple aspirins, lie down, you'll get over it.