ive tried most of the openbox distros out there and i think Antergos has the best out of the box version of it so far
the design of it is very nice. i like having plank on the bottom and the effects that come with compton look very nice. i like the conky that is installed also. just visually everything looks very nice
my quick reviews of different openbox versions
crunchbang - ive used this in the past and this is probably my 2nd favorite version of openbox. also has a nice look out of the box but hasnt been updated in over a year. hard to get latest software packages on it and openbox seems to run faster on arch based systems.
manjarobox - i just came from manjarobox and its pretty nice out of the box also. big problem is the maintainer of it just quit along with several other members. i question how long manjaro will be around really. so hasnt been updated in quite a while. manjarobox seems to run slower than other arch versions.
archbang - i was tempted to go with archbang because it was blazing fast. its been around for a while now and seems like a very good distro. doesnt look that good out of the box though. they leave a lot of the configuring up to you. which is good if you like to customize a lot.