[Gene Howe]

Spellman pretty much likes to deal with large orders. I've bought from them a few times. They refused to cut anything to fit my truck. Of those places mentioned, I prefer Timbers and WW's Source. WW's Source is bit pricey but excellent service and really good selection. I've never tried Superior.
If you try Superior, I'd like to hear how you like it.

 

[Gene Howe]

I've lived in AZ so long that I forgot that lumber comes from trees.
Judging from the building materials available at most yards and Big Boxes in N. AZ, I'm not alone.