I can't pick one because it depends on the speakers in question. For instance, IMHO the Paradigm Studios look awful in black ash with the plastic silver feet and all. They look fabulous in Cherry.
The Wilsons look great in enamel, but probably not in Rosenut or textured.
Other speakers might look fabulous in Piano black and not so good in Cherry and so on.
Hmm, it looks as though the Rosenut is the leader in the poll.
I happen to have ordered my Paradigm Studio 100s in Rosenut because I thought the Cherry (which looks the best with this model) was higher priced, or so I was told by a slightly less than honest dealer whom I did not order from, but assumed he was right on that. I only discovered after ordering that he was wrong. I'll be unboxing them this weekend.