Grizzly Boot company in Missoula, MT also makes boots...like the smoke jumpers, etc.
Whites are great...My brother wears those all the time. When they are totally thrashed, send them in for a rebuild and you can not believe the job they do on them. Plus, you can design your own boot.
Make sure you get measured...EVERY time you get new boots or shoes. Feet keep growing, flattening and changing all the time. Even if you want to order online, shop locally and get your foot measured, try the brand you're looking at if you can to be sure.
And, if you can afford it, buy more than one pair, so you can alternate days between wearings. It will help them last longer. Buy the 'care and upkeep' package (polish, cleaner, waterproofer, whatever)...it doesn't make any more sense to wear a boot all the time and not take care of the leather than it does to not take care of your gun. Also buy a bottle of the appropriate heel and sole 'dressing'..it's a liquid dye type product in a small bottle with a dauber. It will help keep the edges of the sole of the boot in good condition, help them to last longer, AND it looks good. Even if I don't have time to polish my boots, a quick trip around the sole with that dauber helps make them look nice. usually comes in Black and brown, match it to the sole, and match leather sole to leather sole dressing, rubber soles to rubber sole dressing. Also... boots tend to get a wear mark on the back of the heel from driving, and you can recolor that with the sole dressing.
Polish frequently...it keeps the leather soft, and helps make them wear longer. If you wear them so long that the finish is worn off before you polish them, they won't have any waterproof qualities, resist stains or anything.
boot sox are nice... some like Thorlos or Justin have an extra thick sole for comfort, and are regular sock on all the rest of the foot for fit. Some of the Thorlos have an additional support band woven in around the instep of the foot that is quite comfortable, too. Buy sox longer than your boot top, that way they won't scrunch down, wad up and end up uncomfortable.
hope this helps!
(formerly of western wear store and boot shine girl)