There is no "high quality" leather sofa available online. Just as there is no "high quality" fabric sofa online: )

A thousand people will argue there is, but it's truth.

Hancock and Moore is excellent, Taylor King is very good as well.. You need a quality brick and mortar furniture store or a designer for either.

Depends your budget for anything else, or even online. Construction and leather affect price. If you must buy one online ? I would look at Arhaus, or Room and Board - both have good customer service ....

Neither of those will give you the vast leather selection available at the "excellent " level.

You must remember too, , you can't flip a seat or back cushion with leather....( the back side has a breathing panel sewn in) .

I think it depends on your style too. IMO no one makes a better contemporay leather sofs than the Italians I think they first and foremost have access to some of the best leather in the world. The good italian makers use no springs , their furniture is leather everywhere not just on the parts your body touches . You need to go shopping and IMO decide what your style is before going. You need to sit, ask many questions to get a product that if good quality will last for a very long time .

If you have a Scandanavian design/furniture store near you, check them out. We've had several leather sofas and loveseats from a store called Danco Modern in northwestern Massachusetts. They carry different leather brands. We've always been pleased. Last sofa lasted over 10 years. I agree you shouldn't try to buy something online, you need to see and feel the product in a store.

I recently purchased a Capa sofa from Poly & Bark, and I'd say the quality of leather and build is comparable if not better than similar sofas I've sat on from West Elm, CB2 and Article. Very happy!