If Apple had priced the Classic Buckle $50 less, I'd own one by now. As it is, I waffle. So far I'm batting .500 in third-party bands. My latest Nike knock-off is pretty decent. It's thinner than the Real Deal, but if you didn't know what that was like, this one could easily pass. And for $15, I'm happy.
I don't want to wear any band that has me saying "but it was only...". So far I haven't seen anything except the Herm?s that matches Apple's quality in leather. Several Sport bands seem ok. I just don't want a band that reminds me "hey, remember you only paid..." That's basically apologizing to myself for a choice I made. Someone I know was wearing some sunglasses that from a distance looked like Wayfarers. When I got in speaking range, they obviously weren't. "Who makes those?" "Oh, they're Ray-Bans." "Uh, no." "Ok, they're Bay-Rans, but they look just like Ray-Bans and were only ten bucks!" As long as he's happy. But not on my face.
So bands don't have to be Apple bands, but they have to look good for what they are and not cost a limb or two.