I have spent many hours looking at Joomla templates on the web and I am a member of 2 of the other larger clubs, but I have to say that Joomla art is consistently the best in my opinion as far as style and quality go. I have read complaints that a lot of their templates look similar, but I must say again, a template is only the start. It is what you do with it that matters. The support is OK, I think. I am fairly skilled and am able to customize to my liking, but when ever I have had a problem, I have been able to find an answer in the forum. Forums are the best place to find answers. Having a large community makes it easier to find answers. To sum it up, JA has the best mix of quality,stylish templates out of any Joomla template site.
