The Bears gave up 2 first rounders and a 3rd for Cutler, and he's half the QB Alex Smith is. I've been saying it for a couple years; Smith is a much better qb than most of you are willing to give him credit for. Get him in a stable situation where he's not learning earning a new offense every year and he does well. The guy had a 70% completion and 8 yards/attempt this year when he got injured, and he's only 28.
I'm sure it doesn't sound like an exciting trade to most Chiefs fans, but I can't imagine a better situation for Smith than going to the Chiefs and Andy Reid.