Nexus 5 from Google (even though LG makes it). It doesn't have all of those carrier installed apps bullshit and will always have the latest version of Android without the updates being delayed and filtered by the carriers.

It has a 5 inch screen and is probably the lightest phone I have ever carried and definitely the biggest phone I have carried in my front pants pocket.

I got it all sorted out over the weekend. I think this will be my favorite phone to date.