Man, I'm no expert, but I have killed them all, and it looks like a Merriam's to me. The buff tips are a little more tan looking than most Merriam's, but look how wide those buff tips are. That's the stand apart detail for me. Yes the tips are sort of Rio colored, but I've never killed Rios with tips that wide.
As for the color, in your second pic, I see green irredecent bars on the body feathers. And that's what you should expect from a Merriam's. Also, the predominately Merriam's trait, irredecent band in the black of the tail feathers. Others species produce that trait on occasion, but every Merriams I've ever seen has it.