If you want to see an in-depth discussion on luggage, head to
FlyerTalk.
I love leather too - but not for daily use luggage. You want to let a cabbie throw it in the back of a ratty cab/rickshaw/tuk tuk/etc. on top of his jumper cables without flinching; if the F/A won't let you take in on board and says, "check it or miss the flight"; Watch the bellhop stack the bag on top if the ratty umbrella stroller; et al. Plus, leather is a better theft target than the ubiquitous black ballistic nylon bag. I want my luggage to blend in, not stand out.
Briggs and Riley makes outstanding stuff. Great quality, Guaranteed for Life.
I use a costco wheeled bag, if it breaks, costco will take it back.