I hate to sound like an advertisement but I've messed with a lot of these, both Stroud and rr. Out of your list, r&r is the only one that manufacturers their buildings. All metal and all trusses are built by them here in NC. They have their posts "farm spec" cca treated to last lifetime and buy the rest of the lumber in bulk. You'll have a hard time finding a better price on a building kit. Their trusses aren't built in and designed for being in the Deep South, you can easily see they are built to take more roof load.
And last but not least in my opinion in the most important probably is being they're right here and build their own buildings, they can customize them however you want and I've seen some crazy shit drawn up and built. They also make mistakes just like everyone else and instead of waiting a month to get it fixed because you're buying from a reseller, it takes a day. Same with me making mistakes, it's right here, several times have screwed up a roof panel only to have a replacement ready in an hr or run out of screws or needed a piece of trim to be 13ft instead of 10 or a truss modified.
Anyways, that's my opinion. Also my opinion is you're never going to completely keep mice out of a building, even the most efficient up to date modern homes can't keep them out.