We use Artistic Pursuits. I like the incorporation of Art Study into the projects. The projects work, too, which not being artistic I'm always happy about.
This year we are taking Art class at our local Art Museum for homeschoolers. I love the going through the museum with the docent part. I don't love the projects ... I thought it might be more teaching them about how to draw, paint, model, etc. Instead it seems to be much more "here's supplies, have at them!"
For Art resources: I love the Simply Charlotte Mason Picture Study Portfolio packs. The Masterpiece Cards are high quality, if a little small. I don't get them out as much as I expected to. Finally, the resource we use the most is ART Page a Day calendar.