Nice shots! Agree with the Female and Male House Finch IDs.
I use Sibley's Guide to Birds. He has an East and West field guide, but just have the larger volume that covers the entire US. It isn't so good for carrying around in the field, but I don't ever carry books around anyway. I have enough trouble just carrying my camera gear. I ID them from the photos after I get home.
I do also have the National Geographic Field Guide to the birds of North America and I use it if I can't find what I'm looking for in Sibley's. Sometimes a different view helps.
In the past I would use the Thayer's Birding software. It helped when I didn't have a clue. You can put in key things like approx size, colors, eye ring or no, wing bars or no, region, etc. and it will give you a list with photos and sounds of all the likely suspects. I don't know if there is better software available now or not. There are some good websites:
All About Birds : How to ID Birds Patuxent Bird Identification InfoCenter WhatBird | identify birds | bird identification guide | north america